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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

Ruby Invisible Set Gold Earrings
Located in Chicago, IL
. Having very fine color, vivid bright Rubies. 200 invisible set stones totaling approximately 6 Carats
Category

Early 2000s Unknown More Earrings

Materials

Ruby, 18k Gold

Art Deco Inspired Large Ruby and Diamond Flower Earrings in 18 Karat Yellow Gold
Located in London, England
A spectacular pair of invisibly-set ruby and diamond flower convertible clip-on earrings set in 18
Category

2010s British Art Deco Clip-on Earrings

Materials

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

Van Cleef Arpels Late 20th Century Ruby Diamond Platinum Mystère Earrings
By Van Cleef Arpels
Located in New York, NY
weight of 8.50 carats, G/H color, VS clarity, and 186 invisibly set rubies with an approximate total
Category

20th Century French Clip-on Earrings

Materials

White Diamond, Ruby, 18k Gold, Platinum

Rubies Diamonds Bracelet Invisible Set, 2000
Located in Herzelia, Tel Aviv
Rubies Diamonds Bracelet set Invisibly. Very high-quality Rubies of deep red color. Hand made in
Category

Early 2000s Modern Modern Bracelets

Materials

Diamond, Ruby, 18k Gold

Invisibly Set Burmese Ruby Flower Brooch
Located in New York, NY
Impressive invisible " mystery"set design "Burma" ruby brooch. The workmanship
Category

2010s Unknown Artist Brooches

Materials

Ruby, 18k Gold

Ruby Diamond Gold Invisibly Set Earrings
Located in Los Angeles, CA
Diamond accents and Rubies. Features a post back with clips. In excellent vintage condition. Please
Category

20th Century American Clip-on Earrings

Materials

Diamond, Ruby, 18k Gold

Invisibly Set French Cut Ruby Gold Band Ring
Located in Aspen, CO
39 fine fancy cut French cut invisibly set natural vivid red rubies create a wonderful statement
Category

20th Century Unknown Contemporary More Rings

Materials

Ruby, 18k Gold

1980s Invisibly Set Sapphire Ruby Gold Ear Pendants
Located in New York, NY
A pair of impressive invisible set sapphires and ruby ear pendants, circa 1980. Mounted on 18kt
Category

Vintage 1980s Italian Drop Earrings

Materials

Blue Sapphire, Ruby, 18k Gold

Sabbadini Invisible set Gold Ruby and Diamond Flower Brooch
By Sabbadini
Located in Chicago, IL
set with very Fine Bright Gem color Burma Rubies totaling approximately 30 Carats and further set with
Category

1990s Italian Brooches

Materials

Diamond, Ruby, 18k Gold

18K and Invisibly Set Natural Fancy Cut Ruby Ring
Located in Aspen, CO
18K gold ring with fine vivid red Rubies. The natural rubies all invisibly set and faceted on the
Category

21st Century and Contemporary American Contemporary Fashion Rings

Materials

Ruby, Gold, 18k Gold

18 Karat Yellow Gold Invisible Set Diamond and Ruby Bracelet
Located in Scottsdale, AZ
Color: G Clarity: VS Ruby: 256 princess cut = 25.60cttw Dimensions: bracelet is 7 inches long and it is
Category

21st Century and Contemporary More Bracelets

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Set in 18K Gold, invisible set Blue Sapphires, Rubies Diamonds Cluster Ring
By JEWEL HUB
Located in Hong Kong, HK
0.70 carats. The Rubies & Blue Sapphires are of Thailand origin and are invisibly set. The Diamonds
Category

21st Century and Contemporary Indian Modern Cluster Rings

Materials

Diamond, Ruby, Blue Sapphire, 18k Gold

Mazer Art Deco Faux Ruby Invisibly Set Link Bracelet
By Mazer Bros
Located in New York, NY
Mazer Art Deco faux ruby leaves invisibly set link bracelet of rhodium plated base metal, small
Category

Vintage 1930s American Art Deco Link Bracelets

Materials

Crystal, Rhodium, Base Metal

Vintage Ruby and Diamond 18k Yellow Gold Invisible Set Dome Ring
Located in Beverly Hills, CA
One Vintage Ruby and Diamond 18k Yellow Gold Invisible Set Dome Ring. Featuring 35 calibré cut
Category

1990s Dome Rings

Materials

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

3.24 Carat Total Invisible Set Princess Cut Rubies and Diamond Gold Pendant
Located in Chicago, IL
a diagonal row of 0.46 carat total princess cut diamonds. All the stones are invisibly set so you
Category

Early 2000s American Contemporary Pendant Necklaces

Materials

Ruby, 18k Gold

18 Karat Yellow Gold Invisible Set Pigeons Blood Ruby and Diamond Ring
Located in Scottsdale, AZ
: 36 invisible set square faceted cut = 3.24cttw Ruby: 1 pear cut = .52ct Color: Pigeons Blood Clarity
Category

21st Century and Contemporary More Rings

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Invisible Mystery Set Ruby and Diamond Cocktail Earring 18 Karat White Gold
Located in New York, NY
Invisible or Mystery set Princess cut Burma Ruby And Diamond Cocktail Earring in 18 K White
Category

Early 20th Century Lever-Back Earrings

Materials

Diamond, Ruby, 18k Gold

18 Karat White Gold Diamond Ruby Invisible Small Heart Earring Ring Set
Located in Los Angeles, CA
This ruby sweet heart earring and ring set is crafted in 18-karat white gold, weighing
Category

2010s American Stud Earrings

Materials

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

Diamonds Princess Cut Invisible Set Natural Rubies Ring 14 Karat Yellow Gold
Located in New York, NY
Invisible or Mystery set Princess cut Natural Ruby And Diamond ring in 14 K Yellow Gold
Category

2010s Wedding Rings

Materials

Diamond, Ruby, 14k Gold, Yellow Gold

Modern Invisible Set Princess Cut Natural Ruby Ring in 18K White Gold ~4ctw
Located in Fairfield, CT
Modern Invisible Set Princess Cut Natural Ruby Ring in 18K White Gold Designed with modern
Category

21st Century and Contemporary Modern Fashion Rings

Materials

Ruby, Gold, 18k Gold, White Gold

Invisible Mystery Set Ruby and Diamond Owl Pin or Pendant 18 Karat White Gold
Located in New York, NY
Invisible or Mystery set Princess cut Burma Ruby And Diamond Owl Pin/ Pendant in 18 K White
Category

Early 20th Century Brooches

Materials

Diamond, Ruby, 18k Gold

18 Karat Gold 1.10 Carat Diamond and Invisible Set 1.00 Carat Ruby Band Ring
By Van Cleef Arpels
Located in Southampton, PA
The extravagant appearance produced by the scintillating diamonds and the captivating rubies is
Category

21st Century and Contemporary Band Rings

Materials

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

1980s Vintage 18 Karat Gold Invisible Set Multi-Gem Ice Cream Cone Brooch
Located in Philadelphia, PA
Brooch designed as ice cream cone with a scoop of white mother-of-pearl bezel set with ruby
Category

Vintage 1980s Contemporary Brooches

Materials

Amethyst, Aquamarine, Citrine, Garnet, Iolite, Peridot, Ruby, Blue Sapph...

Mystery Set Ruby and Diamond Ring, 18 Karat Yellow Gold
Located in New York, NY
An invisibly set, mystery ring with Rubies with diamonds on the side. Set in 18 Karat Yellow Gold
Category

20th Century Cocktail Rings

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Ruby and Emerald Cut Diamond Cocktail Bombé Ring Set in Platinum
Located in London, England
designed in a bombé design and is invisibly set throughout with square cut rubies. All of the rubies have
Category

2010s American Art Deco Cocktail Rings

Materials

Diamond, Ruby, Platinum

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

Diamond and Ruby Dragonfly Pendant Necklace Set in 18 Karat Yellow Gold
Located in London, England
, the body of the insect is composed of graduating invisibly set calibre-cut rubies which are all
Category

2010s British Modern Pendant Necklaces

Materials

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

Ruby, Sapphire, Diamond and Garnet Parrot Brooch Set in 18k Yellow Gold
Located in London, England
invisibly-set with calibre-cut rubies, sapphires and green garnets, the head embellished with pave-set round
Category

2010s Unknown Modern Brooches

Materials

Diamond, Garnet, Ruby, Sapphire, Blue Sapphire, Gold, 18k Gold, Yellow Gold

Ruby Diamond Gold Bombé Ring
Located in Miami, FL
bombé plaque, this fabulous ring is resplendent in cts of invisible-set genuine round-faceted rubies
Category

Vintage 1970s Cluster Rings

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Poniros Ruby and Diamond Bracelet
By Poniros
Located in Miami, FL
total, G color VS clarity. Six squares, invisibly set with 4 square cut rubies in micro pave set diamond
Category

21st Century and Contemporary Unknown Modern Modern Bracelets

Materials

Diamond, Ruby, 18k Gold, White Gold

Ruby diamond brooch with matching earrings
Located in Dallas, TX
Stunning set for the right outfit! Invisible and channel-set, rubies along with bead-set diamonds
Category

Late 20th Century Modern More Jewelry

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

【Petite Signature】Ruby Mosaic Heart Ring
Located in New York, NY
heart crafted from 0.7ct of natural rubies, invisibly set for a seamless finish. The heart rests atop a
Category

21st Century and Contemporary Japanese Engagement Rings

Materials

Ruby, Diamond, 18k Gold

1920 s Art Deco Diamond Ruby Emerald Bracelet
Located in New York, NY
Ruby Sections - each Invisible set with 4 Rubies. These segments alternate with 2 ruby connectors & 2
Category

Early 20th Century American Link Bracelets

Materials

Diamond, Emerald, Ruby, Platinum

Ruby and Diamond Heart in 14 Karat White Gold
By Gregory Mikaelian Sons, Inc.
Located in Los Angeles, CA
14k white gold "invisible" set 15 princess cut rubies weighing .40pts. surrounded by 26 round full
Category

2010s American Contemporary Pendant Necklaces

Materials

Diamond, Ruby, 14k Gold

Ruby, Diamond and Gold Vintage Ring, circa 1960
Located in Aspen, CO
Invisibly set natural bright vivid rubies are accented on both sides by brilliant cut diamonds
Category

Mid-20th Century Unknown Band Rings

Materials

Diamond, Ruby, Gold, 14k Gold

Ruby Diamond Gold Ring
Located in Darnestown, MD
Stunning and graceful diamond ring with invisibly set Burma rubies. The central diamond is .5
Category

Vintage 1980s American Cocktail Rings

Materials

Diamond, 18k Gold

Retro Style Ruby Diamond 18 Karat Yellow Gold Ring
Located in Boca Raton, FL
Invisibly set princess cut rubies and round brilliant cut diamonds are set in 18 karat yellow gold
Category

Late 20th Century Unknown Retro More Rings

Materials

White Diamond, Ruby, 18k Gold, Yellow Gold

Diamond Ruby and Sapphire Yellow Gold Flower Clip-On Earrings
Located in Southampton, PA
yellow gold and the pair is splendidly decorated with an attractive blend of invisible-set diamonds
Category

20th Century Clip-on Earrings

Materials

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

7.27 Carats Total Ruby and Diamond Open-Work Circular Dangle Earrings
By Roman Malakov
Located in New York, NY
-matched rubies, invisibly set in an 18k rose gold mounting. The earrings are accented with round brilliant
Category

21st Century and Contemporary American Contemporary Dangle Earrings

Materials

Diamond, Ruby, 18k Gold, Rose Gold

9.03 Carat Ruby and Diamond Fashion Dome Ring in Rose Gold
By Roman Malakov
Located in New York, NY
A unique fashion domed ring showcasing a cluster of vibrant rubies, invisibly-set in a domed
Category

21st Century and Contemporary American Modern Fashion Rings

Materials

Diamond, Ruby, 18k Gold, Rose Gold

Art Deco Sapphire, Ruby and Diamond Convertible Eternity Flip Ring in Platinum
Located in London, England
An early 1930’s sapphire, ruby and diamond convertible flip ring set in platinum. This piece is
Category

Vintage 1930s British Art Deco Band Rings

Materials

Diamond, Ruby, Sapphire, Platinum

0.74 Carat Total Princess Cut Ruby Ans Diamond Cocktail Ring in 18 Karat Gold
Located in Chicago, IL
and features a row of invisibly channel set rubies in the center totaling 0.74 carats. These hand
Category

2010s American Contemporary Cocktail Rings

Materials

White Diamond, Ruby, Yellow Gold

Ruby Diamond 18 Karat Gold Flower Brooch
Located in New York, NY
Crafted in 18 karat white gold this brooch features invisibly set fine rubies and round cut
Category

21st Century and Contemporary Brooches

1.5 Carat Ruby 1.25 Carat Diamond Tear-Drop Shape Earrings 18 Karat In Stock
Located in Boca Raton, FL
Gemstone/Diamond Details: There are approximately 1.5 carats of invisibly set, natural, rubies. There are
Category

21st Century and Contemporary American Modern Chandelier Earrings

Materials

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

Ladybugs cufflinks sapphire diamonds white gold
Located in Monte Carlo, MC
Ladybugs cufflinks paved with sapphires invisibly set, diamonds, cabochon rubies, size 2cm (21,2grs)
Category

21st Century and Contemporary Monacan Cufflinks

Materials

Diamond, Ruby, Sapphire, 18k Gold

Trifari Invisibly Set Ruby Flower
By Alfred Philippe for Trifari
Located in New York, NY
Trifari, Alfred Phillipe Invisibly Set Ruby Flower with ruby waffle glass made to resemble the gem
Category

Vintage 1960s Brooches

Materials

Gilt Metal

18 Karat White Gold Invisible Set Ruby and Diamond Pendant
Located in New York, NY
18K White Gold invisible set ruby and diamond pendant, features 15.00 carats of rubies and
Category

21st Century and Contemporary American Pendant Necklaces

Materials

Ruby, 18k Gold

Alexis 30.88 Carat Invisible Set Ruby Diamond Gold Ballerina Brooch
Located in New York, NY
One of a kind, 18k white gold beautiful ballerina brooch by Alexis, with 30.88cts in invisible set
Category

21st Century and Contemporary Brooches

Materials

Diamond, Ruby, Gold

Rare Coro Invisibly Set Ruby Acorn Duette Clip Brooch
By Corocraft
Located in New York, NY
Rare Coro Invisibly Set Ruby Acorn Duette Clip Brooch from the 1930's. A pair of acorn clip
Category

Vintage 1930s American Art Deco Brooches

Materials

Gilt Metal

Invisible Set Ruby Diamond Butterfly Necklace Vintage 18k Yellow Gold
Located in Torrance, CA
Finely detailed invisible set ruby & diamond butterfly necklace crafted in 18 karat yellow gold
Category

Mid-20th Century Unknown Modern Choker Necklaces

Materials

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

Invisibly Set Ruby Heart Pendant - 18K Yellow Gold
Located in Ben Lomond, CA
An absolutely gorgeous invisible set ruby heart pendant with accent diamonds. It is has a large
Category

1990s American Modern Pendant Necklaces

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Oscar Heyman Invisibly Set Ruby and Diamond Ear Clips
By Oscar Heyman
Located in New York City, NY
Oscar Heyman platinum earrings contain invisibly set rubies (approx 12cts) surrounded by round
Category

2010s American Contemporary Stud Earrings

Materials

Diamond, Ruby, Platinum

Invisible Set Ruby Diamond Ring
Located in Miami, FL
weighing approximately 2.40 carats total. The rubies are invisibly set in a rectangular shape, resting
Category

Vintage 1980s Unknown Modern Band Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

Rare Trifari Alfred Philippe Pave and Invisibly Set Ruby Flower Brooch
By Alfred Philippe for Trifari
Located in New York, NY
Super Rare Trifari Alfred Philippe Pave and Invisibly Set Faux Ruby Poinsettia Star Flower Pin of
Category

Vintage 1960s American Art Deco Brooches

Materials

Gilt Metal

Invisible Set Ruby and dDamond Earrings
Located in New York, NY
larger and three smaller petals, each invisibly set with square cut rubies with total weight of 69.45ct
Category

21st Century and Contemporary European Artist Clip-on Earrings

Materials

Diamond, Ruby, 18k Gold

Diamonds Princess Cut Invisible Set Rubies Men s Ring 18 Karat 2Tone Gold Ring
Located in New York, NY
Diamonds & Princess Cut Invisible Set Rubies Men's Ring 18 Karat 2Tone Gold Ring Invisible or
Category

2010s Wedding Rings

Materials

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

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Invisible Set Ruby For Sale on 1stDibs

Surely you’ll find the exact invisible set ruby you’re seeking on 1stDibs — we’ve got a vast assortment for sale. Every item for sale was constructed with extraordinary care, often using Gold, 18k Gold and Yellow Gold. In our selection of items, you can find a vintage example as well as a contemporary version. Making the right choice when shopping for an invisible set ruby may mean carefully reviewing examples of this item dating from different eras — you can find an early iteration of this piece from the 20th Century and a newer version made as recently as the 21st Century, both of which have proven very popular over the years. An invisible set ruby from Aletto Brothers, Van Cleef Arpels and Sabbadini — each of whom created a beautiful version of this treasured accessory — is worth considering. Take a look at an invisible set ruby featuring Ruby from our inventory today to add the perfect touch to your look. 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 princess cut and square cut alternatives. If you’re browsing our inventory for an invisible set ruby, 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 Invisible Set Ruby?

Prices for an invisible set ruby can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $895 and can go as high as $225,000, while this accessory, on average, fetches $8,300.

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.