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18 Carat White Gold Ruby Square Earrings with Diamond
By La Fleur Jewels
Located in Bangkok, TH
evening party. We use the top quality Ruby which make in invisible setting. The invisible setting is a
Category

21st Century and Contemporary Thai Modern Stud Earrings

Materials

Diamond, Ruby, 18k Gold, White Gold

Eternity Ring in 18 Carat Gold and Synthetic Rubies
Located in PARIS, FR
an "invisible" setting. This ingeniously designed setting allows the stones to shine fully, with no
Category

20th Century Contemporary Wedding Rings

Materials

Ruby, Gold, 18k Gold

Ruby and Diamond Stud Earrings in 18 Carat White Gold
By La Fleur Jewels
Located in Bangkok, TH
for everyday and also for the evening party. We use the top quality Ruby which make in invisible
Category

21st Century and Contemporary Thai Modern Stud Earrings

Materials

Diamond, Ruby, 18k Gold

18 Carat White Gold Ruby and Diamond Small Eternity Ring
By La Fleur Jewels
Located in Bangkok, TH
Ruby which make in invisible setting.It is a classic luxury elegant style that you can use many
Category

21st Century and Contemporary Thai Modern Band Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

Ruby and Diamond Stud Earrings in 18 Carat White Gold
By La Fleur Jewels
Located in Bangkok, TH
use for everyday and also for the evening party. We use the top-quality Ruby which make in invisible
Category

21st Century and Contemporary Thai Modern Stud Earrings

Materials

Diamond, Ruby, 18k Gold, White Gold

1.57 Carat Ruby and Diamond Earrings in 18K White Gold
By Rewa Jewellery
Located in Bangkok, TH
an invisible setting, and 1.69 carats of diamonds. The diamonds include two round old-cut stones
Category

2010s Thai Art Deco Stud Earrings

Materials

Diamond, Ruby, Gold, 18k Gold, White Gold

Vintage Eternity Band Ring in White Gold and Natural Rubies
Located in PARIS, FR
natural princess-cut rubies in an invisible setting all around the band, with a total weight of
Category

Late 20th Century Contemporary Band Rings

Materials

Ruby, Gold, 18k Gold, White Gold

Burma Ruby and Diamond Ring 18 Karat Gold Cocktail Bowtie Designer Ring
Located in Brooklyn, NY
Vintage Ring, never used. Unique Burma Natural Ruby Gemstones Unique Invisible setting bowtie
Category

1990s Thai Fashion Rings

Materials

Diamond, Ruby, 18k Gold

Zorab Creation 44.29-Carat Ruby and Diamond Red Bear Ring
By Zorab Creation
Located in San Diego, CA
set in Invisible Setting This ring, as with all Zorab Creation pieces, is sent with a unique serial
Category

2010s American Art Nouveau Cocktail Rings

Materials

Diamond, Ruby, Tsavorite, 18k Gold, Palladium

Gin Grace 10K Yellow Gold Mozambique Genuine Ruby Ring with Diamonds for women
Located in New York, NY
& Grace ring. This ring is made up of 2MM Square-Cut Invisible Setting Genuine Ruby (24 pcs) 1.68 Carat
Category

21st Century and Contemporary Chinese Art Deco Bridal Rings

Materials

Diamond, Ruby, 10k Gold, Yellow Gold

Georgios Collections 18 Karat Yellow Gold Diamond and Ruby Greek Key Design Ring
By Georgios Collections Inc
Located in Astoria, NY
Princess-cut Rubies in an invisible setting with a total weight of 1.20 Carat. This gorgeous piece can be
Category

21st Century and Contemporary Greek Classical Greek Cocktail Rings

Materials

Diamond, White Diamond, Ruby, Gold, 18k Gold, Yellow Gold

Georgios Collections 18 Karat Yellow Gold Diamond and Ruby Greek Key Design Ring
By Georgios Collections Inc
Located in Astoria, NY
Princess-cut Rubies in an invisible setting with a total weight of 0.70 Carat. This gorgeous piece can be
Category

21st Century and Contemporary Greek Classical Greek Cocktail Rings

Materials

Diamond, White Diamond, Ruby, Gold, 18k Gold, Yellow Gold

18kt White Gold Gem Set Golf Club Bag Set with Diamonds Precious Stones, Hange
Located in Antwerp, BE
Amazing work of art pendant/brooch with beautiful invisible ruby setting. 31 ruby 3 citrine 3 emerald
Category

20th Century Artisan Brooches

Materials

Citrine, Diamond, Emerald, Ruby, 18k Gold, White Gold

Cartier - Vintage Contessa Wedding Band in Yellow and White Gold, Diamonds, Rubi
By Cartier
Located in PARIS, FR
invisible setting all around the band, totaling 9 diamonds and 12 rubies. In excellent condition. Signed
Category

Late 20th Century Contemporary Wedding Rings

Materials

Diamond, Ruby, Gold, 18k Gold, White Gold, Yellow Gold

18 White Gold Flower Ruby Invisible Stud Earrings
By La Fleur Jewels
Located in Bangkok, TH
invisible setting.It is deep red and very sparking. The invisible is a highly technique .We set the stone in
Category

21st Century and Contemporary Thai Modern Stud Earrings

Materials

Diamond, Ruby, 18k Gold, White Gold

Ruby and Diamond Earrings Invisible Setting
Located in Chestnut Hill, MA
18 karat white gold clip earrings consisting of 182 invisible set princess cut rubies having a
Category

21st Century and Contemporary Unknown Contemporary Lever-Back Earrings

Materials

Diamond, Ruby, 18k Gold

Sabbadini Invisible Setting Burmese Ruby Flower Brooch
By Sabbadini
Located in Milan, IT
Sabbadini Invisible Setting Rose Brooch 18k White gold rose brooch, diamond pavé 9,05 caratst and
Category

21st Century and Contemporary Italian Brooches

Materials

Diamond, Ruby, 18k Gold, White Gold

Geraldo Ruby Diamond White Gold Invisible Setting Ring
Located in Ramat Gan, IL
Make a statement with the Geraldo Ruby Diamond White Gold Invisible Setting Ring, a true
Category

21st Century and Contemporary Israeli Contemporary Dome Rings

Materials

Diamond, Ruby, White Gold

Pederzani Feather Ruby and Diamond Invisible Setting Brooch
By Pederzani
Located in Principaute De Monaco, MC
either by a man and a woman. The invisible setting is a masterpiece of goldsmithery. We are proud to
Category

Mid-20th Century Italian Brooches

Materials

Diamond, Ruby, 18k Gold

Sabbadini Bee Brooch Invisible Setting in Rubies with Diamonds
By Sabbadini
Located in Milan, IT
features like Sabbadini’s ‘invisible setting’. It all starts with a bee, then a collection of different
Category

21st Century and Contemporary Italian Contemporary Brooches

Materials

Diamond, Ruby, 18k Gold, White Gold

18K Art Deco Invisible-Set Ruby Dome Ring with Marquise Diamond Cluster
Located in Khet Bang Rak, Krung Thep Maha Nakhon
karat white gold and showcases a mesmerizing composition of natural rubies in an invisible setting
Category

2010s Thai Art Deco Dome Rings

Materials

Diamond, Ruby, 18k Gold

33 Carat Ruby and 4 Carat Diamond Invisible Bracelet in 18 Karat Yellow Gold
By Zahira Fine Jewellery
Located in Bangkok, TH
pieces of natural square cut rubies in five rows of invisible setting surrounded by 148 bezel set round
Category

2010s Thai Art Deco Retro Bracelets

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Exquisite Emerald-Cut Diamond Ruby Halo Stud Earrings in 18K Gold
Located in Khet Bang Rak, Krung Thep Maha Nakhon
invisible setting and ruby halo stud earrings, expertly crafted in 18K gold. A true masterpiece of fine
Category

2010s Thai Art Deco Stud Earrings

Materials

Diamond, Ruby, 18k Gold

Paris Craft House Ruby Diamond Clover Pendant in 18 Karat White Gold
By Paris Precious Craft House
Located in Hong Kong, HK
invisible setting. To paint the silhouette of a lucky clover, craftsmen worked with 4 Oval-cut Rubies firmly
Category

21st Century and Contemporary Hong Kong Modern Pendant Necklaces

Materials

Diamond, Ruby, 18k Gold, White Gold, Gold

Diamond Ruby Invisible Setting Bow Yellow Gold Ring
Located in Southampton, PA
Gorgeous! Estate Yellow Gold Ruby And Diamond Invisible Setting Bow Ring. With Princess cut
Category

20th Century American Cocktail Rings

Materials

Diamond, Ruby, 18k Gold

18 Karat Yellow Gold Diamond and Ruby Invisible Setting Ring
Located in Southampton, PA
carats and with striking rubies that weigh 0.72 carats in total. Ring Top Dimensions: 15mm x 15mm
Category

21st Century and Contemporary Band Rings

Materials

Diamond, Ruby, Yellow Gold, 18k Gold

Diamond Pave and Ruby Invisible Setting Crisscross White Gold Band Ring
Located in Southampton, PA
well as fabulous invisibly set rubies weighing in total 8.50 carats. Ring Size: 6.75 Ring Top
Category

20th Century Band Rings

Materials

White Diamond, Ruby, 18k Gold, White Gold

Van Cleef Arpels Diamond Pave Ruby Invisible Setting Yellow Gold Band Ring
By Van Cleef Arpels
Located in Southampton, PA
18K yellow gold that boasts elegant design topped off with resplendent diamonds and regal rubies. The
Category

20th Century Band Rings

Materials

White Diamond, Ruby, 18k Gold, Yellow Gold

18 Karat Gold and Platinum Diamond and Ruby Invisible Setting Wide Band Ring
Located in Southampton, PA
yellow gold and platinum and boasts a total of 0.90 carats of diamonds and 2.20 carats of rubies.
Category

21st Century and Contemporary Band Rings

Materials

Diamond, Gold

18 Karat Gold Ruby Pendant Invisible Setting
Located in Hong Kong, HK
A gorgeous invisible setting ruby pendant with diamond made in 18k white gold . The approximate
Category

2010s Hong Kong Pendant Necklaces

Materials

Ruby, Gold, 18k Gold

1950s Italian diamond and invisible setting ruby brooch
Located in London, GB
with superior workmanship, the brooch is adorned with invisible set rubies.
Category

Vintage 1950s Italian Contemporary Brooches

Materials

Diamond, Ruby, 18k Gold

Ruby Ballerina Brooch 18 Karat White Gold in Invisible Setting
By La Fleur Jewels
Located in Bangkok, TH
brooch in the motion of ballerina.We use the top quality ruby which make in invisible setting.We set the
Category

21st Century and Contemporary Thai Modern Brooches

Materials

Diamond, Ruby, 18k Gold, White Gold

Pederzani Invisible Setting Ruby Diamond Flower Brooch Yellow White Gold Italian
By Pederzani
Located in Lisbon, PT
Pederzani invisibly-set ruby and diamond flower brooch in 18kt yellow and white gold, late 20th
Category

Late 20th Century Italian Modern Brooches

Materials

Diamond, Ruby, Gold, 18k Gold, White Gold, Yellow Gold

18K White gold invisible Ruby Bangle
Located in Bangkok, TH
Ruby Bangle use the top quality Ruby which make in invisible setting.We set the stone in
Category

20th Century Modern Bangles

Materials

Diamond, Ruby, 18k Gold

18 Karat White Gold Ruby Stud Invisible Ribbon Earrings
By La Fleur Jewels
Located in Bangkok, TH
evening party.We use the top quality Ruby which make in invisible setting.We set the stone in perfection
Category

21st Century and Contemporary Unknown Modern Stud Earrings

Materials

Diamond, Ruby, 18k Gold

18K White gold invisible Ruby Diamond Gold Ribbon Ball Drop Earrings
By La Fleur Jewels
Located in Bangkok, TH
The top quality ruby which make in invisible setting.We set the stone in perfection as we are
Category

21st Century and Contemporary Modern Dangle Earrings

Materials

Diamond, Ruby, 18k Gold

Art Deco Style Invisibly Set Princess Cut Ruby Earrings in 18 Karat White Gold
Located in London, England
invisibly set this gives the illusion of a large square cut ruby once on the ear. Invisible settings consist
Category

2010s British Art Deco Stud Earrings

Materials

Ruby, Gold, 18k Gold, White Gold

New Ruby Diamond Gold Knot Ring
By Baume
Located in Poitiers, FR
three rows of calibrated rubies in invisible settings that are shouldered with diamond pave. The ring
Category

21st Century and Contemporary French Modern Fashion Rings

Materials

Diamond, Ruby, White Diamond, 18k Gold, Gold, White Gold

18K Yellow Gold 1.40ct Diamond and Ruby Ring
By LB Exclusive
Located in Southampton, PA
gold. Domed bezels with rubies in invisible setting punctuate its sculptural silhouette. Diamonds in a
Category

21st Century and Contemporary Cluster Rings

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

18K Yellow Gold 0.86ct Diamond and Ruby Elephant Brooch
By LB Exclusive
Located in Southampton, PA
-shaped bezel on the elephant's body features 2.0 carats total weight of rubies in invisible setting. The
Category

21st Century and Contemporary Brooches

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Platinum 1.05 ct Diamond and 3.86 ct Ruby Ring
By LB Exclusive
Located in Southampton, PA
covered with rich rubies in an invisible setting. A 1.05-carat diamond in a round bezel setting sits on
Category

21st Century and Contemporary Band Rings

Materials

Ruby, Diamond, 18k Gold, Yellow Gold, Platinum

18K Yellow Gold 22.07ct Ruby Bomb Cocktail Ring MF02-102323
By LB Exclusive
Located in Southampton, PA
rounded, curving shape. The top is fully lined with tapering square rubies in an invisible setting. The
Category

21st Century and Contemporary Band Rings

Materials

Ruby, 18k Gold, Yellow Gold

Rare FRED PARIS Mystery Ruby Diamond Set Leaf Pin Pendant, France 18kt
By Fred Paris
Located in Miami, FL
brooch lies an exquisite array of 115 custom square step-cut natural rubies, invisibly set to perfection
Category

1990s French Contemporary Brooches

Materials

Diamond, Ruby, 18k Gold

Heart Petal Ruby Invisible Earrings
By La Fleur Jewels
Located in Bangkok, TH
The top quality ruby which make in invisible setting.We set the stone in perfection as we are
Category

21st Century and Contemporary Clip-on Earrings

Materials

Diamond, Ruby, 18k Gold

18K White gold invisible Ruby Ring Lip
By La Fleur Jewels
Located in Bangkok, TH
A very cute lip design use the top quality ruby which make in invisible setting.We set the stone in
Category

21st Century and Contemporary Modern Cocktail Rings

Materials

Ruby, 18k Gold

18K White gold Ruby dome invisible Ring
By La Fleur Jewels
Located in Bangkok, TH
5 Rows ruby ring use the top quality Ruby which make in invisible setting.It is a classic luxury
Category

21st Century and Contemporary Modern Dome Rings

Materials

Diamond, Ruby, 18k Gold

18K White gold Ruby Invisible Flower Earrings
By La Fleur Jewels
Located in Bangkok, TH
Ruby invisible Flower Earrings use the top quality of ruby which make in invisible setting.We set
Category

21st Century and Contemporary Thai Modern Clip-on Earrings

Materials

Diamond, Ruby, 18k Gold, White Gold

18 Karat White Gold Ribbon Invisible Ruby Ring
By La Fleur Jewels
Located in Bangkok, TH
A very nice Ruby ring use the top quality Ruby which make in invisible setting.We set the stone in
Category

21st Century and Contemporary Unknown Modern Fashion Rings

Materials

Diamond, Ruby, 18k Gold

18 white gold flower Ruby invisible Stud Earrings
By La Fleur Jewels
Located in Bangkok, TH
invisible setting.It is deep red and very sparking. The invisible is a highly technique .We set the stone in
Category

21st Century and Contemporary Unknown Modern Stud Earrings

Materials

Diamond, Ruby, 18k Gold

18 Karat White Gold Flower Invisible Ruby Ring
By La Fleur Jewels
Located in Bangkok, TH
A very nice Ruby ring use the top quality Ruby which make in invisible setting.We set the stone in
Category

21st Century and Contemporary Thai Modern Fashion Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

18 Karat White Gold Invisible Ruby Hoop Earrings S
By La Fleur Jewels
Located in Bangkok, TH
The top quality Ruby which make in invisible setting. We set the stone in perfection as we are
Category

21st Century and Contemporary Thai Modern Hoop Earrings

Materials

Diamond, Ruby, 18k Gold, White Gold

18K White gold invisible Small Ruby Hoop Earrings
By La Fleur Jewels
Located in Bangkok, TH
The top quality ruby which make in invisible setting. We set the stone in perfection as we are
Category

21st Century and Contemporary Thai Modern Hoop Earrings

Materials

Diamond, Ruby, 18k Gold, White Gold

18 Karat White Gold Invisible Ruby Hoop Earrings
By La Fleur Jewels
Located in Bangkok, TH
The top quality Ruby which make in invisible setting.We set the stone in perfection as we are
Category

21st Century and Contemporary Thai Modern Hoop Earrings

Materials

Diamond, Ruby, 18k Gold, White Gold

18 White Gold Flower Ruby Invisible Stud Earrings
By La Fleur Jewels
Located in Bangkok, TH
invisible setting.It is deep red and very sparking. The invisible is a highly technique .We set the stone in
Category

21st Century and Contemporary Thai Modern Stud Earrings

Materials

Diamond, Ruby, 18k Gold, White Gold

18 Karat White Gold Invisible Ruby Hoop Earrings
By La Fleur Jewels
Located in Bangkok, TH
This earrings is top quality Ruby which make in invisible setting. We set the stone in perfection
Category

21st Century and Contemporary Thai Modern Hoop Earrings

Materials

Diamond, Ruby, 18k Gold, White Gold

18 Carat White Gold Flower Invisible Ruby Ring
By La Fleur Jewels
Located in Bangkok, TH
A very nice Ruby ring use the top quality Ruby which make in invisible setting. We set the stone in
Category

21st Century and Contemporary Thai Modern Cocktail Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

18K White godl Ruby and diamond invisible Stud Earrings
By La Fleur Jewels
Located in Bangkok, TH
invisible setting.It is deep red and very sparking. The invisible is a highly technique .We set the stone in
Category

21st Century and Contemporary Unknown Modern Stud Earrings

Materials

Diamond, Ruby, 18k Gold

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Ruby Invisible Setting For Sale on 1stDibs

On 1stDibs, you can find the most appropriate ruby invisible setting for your needs in our varied inventory. Frequently made of Gold, 18k Gold and White Gold, this item was constructed with great care. Find an antique version now, or shop for 14 vintage or 11 modern creation for a more contemporary example of these cherished accessories. If you’re looking for a ruby invisible setting from a specific time period, our collection is diverse and broad-ranging, and you’ll find at least one that dates back to the 20th Century while another version may have been produced as recently as the 21st Century. There have been many well-made iterations of the classic ruby invisible setting over the years, but those made by La Fleur Jewels, Sabbadini and Iris Fine Jewelry are often thought to be among the most beautiful. Today, if you’re looking for a round cut version of this piece and are unable to find the perfect match, our selection also includes square cut and princess cut alternatives. If you’re browsing our inventory for a ruby invisible setting, you’ll find that many are available today for women, but there are still pieces to choose from for unisex and men.

How Much is a Ruby Invisible Setting?

On average, a ruby invisible setting at 1stDibs sells for $4,150, while they’re typically $1,100 on the low end and $117,413 for the highest priced versions of this item.

Why Gold Shines in Jewelry Craftsmanship

Gold is the feel-good metal, the serotonin of jewelry. Wear vintage and antique gold necklaces, watches, gold bracelets or gold rings and you feel happy, you feel dressed, you feel, well, yourself. 

Gold, especially yellow gold, with its rich patina and ancient pedigree going back thousands of years, is the steady standby, the well-mannered metal of choice. Any discussion of this lustrous metal comes down to a basic truth: Gold is elementary, my dear. Gold jewelry that couples the mystique of the metal with superb design and craftsmanship achieves the status of an enduring classic. Many luxury houses have given us some of our most treasured and lasting examples of gold jewelry over the years.

Since its founding, in 1837, Tiffany Co. has built its reputation on its company jewelry as well as its coterie of boutique designers, which has included Jean Schlumberger, Donald Claflin, Angela Cummings and Elsa Peretti. There are numerous gold Tiffany classics worth citing. Some are accented with gemstones, but all stand out for their design and the workmanship displayed.

For the woman who prefers a minimalist look, the Tiffany Co. twist bangle (thin, slightly ovoid) is stylishly simple. For Cummings devotees, signature pieces feature hard stone inlay, such as her pairs of gold ear clips inlaid with black jade (a play on the classic Chanel black and tan), or bangles whose design recalls ocean waves, with undulating lines of lapis lazuli and mother-of-pearl. And just about any design by the great Jean Schlumberger is by definition a classic.

Even had he eschewed stones and diamonds, Southern-born David Webb would be hailed for the vast arsenal of heavy gold jewelry he designed. Gold, usually hammered or textured in some manner, defines great David Webb jewelry. The self-taught jeweler made very au courant pieces while drawing inspiration from ancient and out-of-the-way sources — East meets West in the commanding gold necklaces made by Webb in the early 1970s. The same could be said for his endlessly varied gold cuffs.

In Europe, many houses have given us gold jewelry that sets the highest standard for excellence, pieces that were highly sought after when they were made and continue to be so. 

Numerous designs from Cartier are homages to gold. There are the classic Trinity rings, necklaces and bracelets — trifectas of yellow, white and rose gold. As a testament to the power of love, consider the endurance of the Cartier Love bracelet.

Aldo Cipullo, Cartier’s top in-house designer from the late 1960s into the early ’70s, made history in 1969 with the Love bracelet. Cipullo frequently said that the Love bracelet was born of a sleepless night contemplating a love affair gone wrong and his realization that “the only remnants he possessed of the romance were memories.” He distilled the urge to keep a loved one close into a slim 18-karat gold bangle. 

BVLGARI and its coin jewelry, gemme nummarie, hit the jackpot when the line launched in the 1960s. The line has been perennially popular. BVLGARI coin jewelry features ancient Greek and Roman coins embedded in striking gold mounts, usually hung on thick link necklaces of varying lengths. In the 1970s, BVLGARI introduced the Tubogas line, most often made in yellow gold. The Tubogas watches are classics, and then there is the Serpenti, the house's outstanding snake-themed watches and bracelets.

A collection called Monete that incorporated the gold coins is one of several iconic BVLGARI lines that debuted in the 1970s and ’80s, catering to a new generation of empowered women. Just as designers like Halston and Yves Saint Laurent were popularizing fuss-free ready-to-wear fashion for women on the go, BVLGARI offered jewels to be lived in

Since Van Cleef Arpels opened its Place Vendôme doors in 1906, collection after collection of jewelry classics have enchanted the public. As predominantly expressed in a honeycomb of gold, there is the Ludo watch and accessories, circa the 1920s, and the golden Zip necklace, 1951, whose ingenious transformation of the traditional zipper was originally proposed by the Duchess of Windsor. Van Cleef's Alhambra, with its Moroccan motif, was introduced in 1968 and from the start its popularity pivoted on royalty and celebrity status. It remains one of VCA’s most popular and collected styles.

Mention must be made of Buccellati, whose name is synonymous with gold so finely spun that it suggests tapestry. The house’s many gold bracelets, typically embellished with a few or many diamonds, signified taste and distinction and are always in favor on the secondary market. Other important mid-20th-century houses known for their gold-themed jewelry include Hermès and Ilias Lalaounis.

Find a stunning collection of vintage and antique gold jewelry on 1stDibs.

The Legacy of Ruby in Jewelry Design

This deep red gem is the color of heat and passion — vintage and antique ruby jewelry is perfect for those born in the middle of summer.

Rubies are one of the few gemstones that can give diamonds a run for their money. Just consider the Van Cleef Arpels “scarf” necklace the Duke of Windsor presented to the Duchess on her 40th birthday, in 1936 — set with diamonds and dripping with rubies, a testament to the deep-red gemstone’s power — or the slippers encrusted with 4,600 rubies that Harry Winston made to commemorate The Wizard of Oz’s golden anniversary. July babies have permission to adorn themselves with this beautiful red stone even when it’s not their birthday.

Rubies are considered precious stones — along with diamonds, sapphires and emeralds — and have a hardness of 9.0 on the Mohs Scale, surpassed only by Moissanite and diamonds. They are composed of corundum, a colorless mineral that is also the basic material of sapphires. In the July birthstone, the red of the gemstone — and the various hues seen in sapphires — are produced by the presence of trace elements. In the case of a ruby, this element is chromium. Rubies range in color from vermilion to a violet red. They are also pleochroic, which means that a stone’s hue can vary depending on the direction of viewing. The most sought-after color is pigeon’s blood: pure red with a hint of blue.

Rubies that are hosted in dolomite marble are the most prized: Because the marble is low in iron, so are the rubies, resulting in a more intense color. Rubies found in basalt, which has a higher iron content, are generally darker and less intense.

When shopping for antique and vintage ruby jewelry, remember that the 4Cs of selecting the perfect diamond — color, clarity, cut and carat — also apply to rubies.

According to the Gemological Institute of America, the color of the July birthstone should be a vibrant to slightly purplish red, and the stone should be clear and inclusion-free. Accordingly, the cut should show off its color and clarity. As for the last criterion, fine rubies more than a carat in weight are rare. Often, large rubies are more expensive than diamonds of comparable weights.

Find a collection of ruby necklaces, ruby rings and other accessories on 1stDibs.