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1.15 Carat Natural Loose Purple Spinel Cushion Shape Gem For Jewellery
Located in Peshawar, PK
mistaken for other gemstones like ruby and sapphire throughout history. One of the most famous examples is
Category

21st Century and Contemporary Burmese Arts and Crafts Loose Gemstones

Materials

Spinel

1.10 Carat Natural Loose Grey Spinel Cushion Shape Gem For Jewellery
Located in Peshawar, PK
mistaken for other gemstones like ruby and sapphire throughout history. One of the most famous examples is
Category

21st Century and Contemporary Burmese Arts and Crafts Loose Gemstones

Materials

Spinel

1.35 Carat Natural Loose Purple Grey Spinel From African Mine
Located in Peshawar, PK
orange, spinel has often been mistaken for other gemstones like ruby and sapphire throughout history. One
Category

21st Century and Contemporary Central African Arts and Crafts Loose Gems...

Materials

Spinel

Platinum 0.50ct Diamond and Ruby Pendant Necklace MF53-101525
By LB Exclusive
Located in Southampton, PA
Add a touch of sparkle to any ensemble by adding this exquisite necklace. A 0.70 carat Ruby
Category

21st Century and Contemporary Pendant Necklaces

Materials

Ruby, Diamond, Platinum

Natural 2.91cts Ruby 0.32cts Diamond Band Ring in 18k Gold
Located in jaipur, IN
stunning, designer-made ring is crafted from 18-carat gold and features a RUBY gemstone set within a halo
Category

2010s Indian Band Rings

Materials

Diamond, Ruby, 18k Gold

Vintage Ruby Diamond Bangle Bracelet 14K Yellow Gold
Located in Montgomery, AL
gemstones 5 - 3.8mm Round Cut Ruby Gemstones; Purplish Red Color; Estimated Combined Weight: 1.25 Carats 4
Category

20th Century Bangles

Materials

Diamond, Ruby, Gold, 14k Gold, Yellow Gold

Vintage 0.80 Carat Ruby and Diamonds Stud Earrings 14k Gold Mexico
Located in Miami, FL
0.70 carat of Red Ruby gemstones and approx 0.10 carat of diamonds for a total carat of approx 0.80
Category

Vintage 1980s Mexican Stud Earrings

Materials

Diamond, Ruby, 14k Gold, Yellow Gold

Stunning Platinum 950 Engraved Natural Ruby: Ring Band, Size 5.5
Located in New York, NY
: 5.5 (Not Sizeable) 1: Gemstone: Natural Ruby Gemstone Weight: 3.24 Ct Gemstone Cut: Square French Cut
Category

21st Century and Contemporary Art Deco Band Rings

Materials

Ruby, Platinum

9.75 Star Sapphire Black sapphire stunning certified 100% natural
Located in Jupiter, FL
Rare matching pair of rubies, untreated and certified. NATURAL GEMSTONE(S): NATURAL SAPPHIRE
Category

21st Century and Contemporary Loose Gemstones

Materials

Star Sapphire

Ruby diamonds art deco studs earrings 18k yellow gold
Located in London, GB
0.92ct Ruby diamonds art deco studs earrings 18k yellow gold Composed of 0.92ct total gemstone
Category

21st Century and Contemporary European Art Deco Stud Earrings

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

LB Exclusive 14K Yellow Gold 0.10ct Diamond Ruby Pendant Necklace PD4-16063YRU
By LB Exclusive
Located in Southampton, PA
A row of Ruby gemstones is accented by round-cut Diamonds totaling 0.10 carats on this exquisite
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Ruby, Yellow Gold

Ruby Diamond Ring, Yellow Gold, Natural Ruby and Diamond Channel Set
By Five Star Jewelry
Located in Austin, TX
clean) Diamond Color: G (excellent, near colorless) Diamond Shape: Round Gemstone: Ruby Gemstone Shape
Category

21st Century and Contemporary American Retro Cocktail Rings

Materials

Diamond, Ruby, 14k Gold, Yellow Gold

Ruby and diamond halo engagement ring 18k white gold
Located in London, GB
red round cut Ruby gemstone surrounded by a halo of sparkling diamonds, this piece is perfect for
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

Vintage Ruby Diamond Band 9K Rose Gold Circa 1903
Located in Montgomery, AL
: 6 1/2 Sizable Upon Request Accented by the following gemstones 5 - 3.5mm - 3mm Red Ruby Gemstones
Category

Early 20th Century Victorian Band Rings

Materials

Diamond, Ruby, Gold, 9k Gold, Rose Gold

Ruby and diamonds engagement ring 18k white gold
Located in London, GB
Ruby round cut gemstone that captures the essence of elegance. Crafted in 18k white gold with precision
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

Vintage Ruby Diamond Cocktail Ring
Located in Montgomery, AL
Natural Oval Cut Ruby Gemstones; Estimated Combined Weight: 0.8 Carat 26 - 1.4mm Single Cut Diamonds
Category

20th Century Art Deco Cocktail Rings

Materials

Diamond, Ruby, Gold, 14k Gold, White Gold, Yellow Gold

Ruby Diamond Halo Necklace in 18k Yellow Gold
Located in Honolulu, HI
adjustable by 1.5" Gemstone: Red Ruby Gemstone Shape: oval Gemstone Carat Weight: 0.21 carats Diamond
Category

Mid-20th Century Unknown Modern Pendant Necklaces

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Natural 0.71cts Emerald, 1.02cts Ruby 0.76cts Diamond Ring in 18k Gold
Located in jaipur, IN
RUBY gemstone set within a halo of sparkling diamonds. The warm glow of gold enhances the gemstone
Category

2010s Indian Band Rings

Materials

Diamond, Emerald, Ruby, 18k Gold

Beauvince Rosemary Ruby Earrings (14.23 ct Rubies Diamonds) in White Gold
By Beauvince Jewelry
Located in New York, NY
make them ideal for modern styling and appeal.  Gemstones Type: Ruby  Gemstones Shape: Oval  Gemstones
Category

2010s Contemporary Chandelier Earrings

Materials

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

Natural 2.98Cts Emerald, 0.19Cts Ruby 0.42Cts Diamond Ring in 18k Gold
Located in jaipur, IN
stunning, designer-made Ring is crafted from 18-carat gold and features an EMERALD AND RUBY gemstone set
Category

2010s Indian Fashion Rings

Materials

Diamond, Emerald, Ruby, 18k Gold

Vintage Antique Horse Face Emerald and Ruby Pendant 925 Sterling Silver
Located in New York, NY
Vintage Antique horse face Green Emerald and Ruby gemstones pendant. Featuring 10 round cut bezel
Category

2010s Modern Pendant Necklaces

Materials

Emerald, Ruby, Sterling Silver

Vintage Ruby Ring 14 Karat Yellow Gold Flower Design Cluster with Diamonds
Located in Brooklyn, NY
Vintage Ruby Ring circa 1970's Flower Design Cluster Center Stone round shape 5.0 mm Ruby Gemstone
Category

Vintage 1970s Cluster Rings

Materials

Ruby, Diamond, 14k Gold, Yellow Gold

Vintage 8.5mm Pearl, Ruby and Diamonds Ring 14k Gold
Located in Miami, FL
Pearl measuring 8.5mm and 0.25 total carat weight of Ruby gemstones channel set with bezel set diamonds
Category

Vintage 1980s Cluster Rings

Materials

Diamond, Pearl, Ruby, 14k Gold

Natural 0.30cts Ruby 0.15cts Diamond Ring in 14k Gold
Located in jaipur, IN
stunning, designer-made, radiant-shaped Ring is crafted from 14-carat gold and features a Ruby gemstone set
Category

2010s Indian Band Rings

Materials

Diamond, Ruby, 14k Gold

Vintage Ruby Center and Diamonds Surrounding Cluster Ring 18k White Gold
Located in Miami, FL
diamonds that weight approx total of 0.75ct. The center oval shaped Ruby gemstone measures approx 15.6mm
Category

Vintage 1980s Cluster Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

0.75 Carat Oval Cut Ruby Diamond Cocktail Ring Platinum in Stock
Located in Boca Raton, FL
Material: Platinum Gemstone details: Approx. 0.75 oval cut Ruby gemstone Diamond details: Approx
Category

21st Century and Contemporary American Cocktail Rings

Materials

Diamond, White Diamond, Ruby, Platinum

Retro Gold Pendant 10.50 Carat Natural White Cabochon Opal and Ruby Gem
Located in Los Angeles, CA
Retro 9K Gold Pendant Natural White Cabochon Opal & Ruby Gemstone Circa 1950. The opals weigh
Category

Vintage 1950s Unknown Retro Pendant Necklaces

Materials

Opal, Ruby, Gold

18K Yellow Gold 1.50ct Diamond and Ruby Ring MF34-101725
By LB Exclusive
Located in Southampton, PA
vibrant Ruby gemstones totaling 3.64 carats. At the center, round-cut Diamonds totaling 1.50 carats
Category

21st Century and Contemporary Cluster Rings

Materials

Ruby, Diamond, 18k Gold, Yellow Gold

Diamond and Ruby Heart Shape Eternity Ring 14k Gold
Located in Miami, FL
high quality details showing hearts connecting with diamonds and ruby gemstones in the center of each
Category

Vintage 1980s Fashion Rings

Materials

Diamond, Ruby, 14k Gold, Yellow Gold

LB Exclusive 14K Yellow Gold 0.15ct Diamond Ruby Pendant Necklace NK4-14783YRU
By LB Exclusive
Located in Southampton, PA
A series of captivating Ruby gemstones and sparkling Diamond accents totaling 0.15 carats make this
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Ruby, Yellow Gold

Evil Eye 14 Karat Personal Birthstone July Birthstone Red Gemstone Ruby Necklace
Located in Brooklyn, NY
Natural Ruby gemstone - default is yellow gold (other option for white gold or rose gold) Please indicate
Category

2010s American Choker Necklaces

Materials

Ruby, 14k Gold

Vintage Burma Ruby Gypsy Ring - Size 9.25 14K Yellow Gold
Located in Los Angeles, CA
stunning Burma ruby gemstone, renowned for its exceptional quality and vibrant color. The ruby showcases a
Category

Vintage 1960s Contemporary Solitaire Rings

Materials

Ruby, 14k Gold, Yellow Gold

Certified Natural Diamond - Real Ruby Ring White Gold Vermeil Ring cocktail Ring
Located in Delhi, DL
Certificate- Yes Gemstone name- Ruby Gemstone type- Natural real Gemstone Certificate- Yes
Category

21st Century and Contemporary Indian Romantic Engagement Rings

Materials

Diamond, Ruby, Gold Plate, Sterling Silver, White Gold

18K White Gold 0.75ct Diamond and Ruby Cross Necklace
By LB Exclusive
Located in Southampton, PA
cross pendant comes to life thanks to Ruby gemstones totaling 1.28 carats and Diamond accents with a
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Ruby, 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

Ruby diamond halo art deco studs earrings 18k white gold
Located in London, GB
natural ruby gemstone surrounded by round brilliant cut diamonds studs earrings 18k white gold Ruby oval
Category

21st Century and Contemporary British Art Deco Stud Earrings

Materials

Diamond, Ruby, 18k Gold, White Gold

18K Yellow Gold Diamond and Ruby Ring MF07-101725
By LB Exclusive
Located in Southampton, PA
design, rounded Ruby gemstones with a total weight of 1.80 carats are arranged in a delicate floral
Category

21st Century and Contemporary Cocktail Rings

Materials

Ruby, Diamond, 18k Gold, Yellow Gold

Natural 0.76 Carat Diamond and 0.12 Carat Ruby 18-Karat Cocktail Ring In Stock
Located in Boca Raton, FL
carats of princess-cut ruby gemstones Ring Size: 5.75 (can be sized) Total Weight: 6.5g (4.2dwt
Category

21st Century and Contemporary American Modern Cocktail Rings

Materials

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

Vintage Men’s 4 Carat Sapphire and Ruby Statement Ring 14 Karat
Located in Miami, FL
Vintage Men’s 4 Carats Sapphire & Ruby Statement Ring. The ring has a sparking beauty made for the
Category

Vintage 1980s Cocktail Rings

Materials

Ruby, Sapphire, 14k Gold, Yellow Gold

18K White Gold Oval cut Ruby Flower Cocktail Ring with Diamonds
By VR Jewels
Located in New York, NY
gift for anyone on your list. The ruby gemstone give your relationship energy and sensuality
Category

21st Century and Contemporary American Art Deco Cocktail Rings

Materials

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

18 Karat White Gold 0.99 Carat Ruby Diamond Pave Cross Pendant Necklace
Located in Boca Raton, FL
in color and VS in clarity Gemstone Details: Approx. 0.99ctw of round cut Ruby gemstones Clasps
Category

21st Century and Contemporary American Pendant Necklaces

Materials

Diamond, White Diamond, Ruby, 14k Gold, White Gold

Royal Natural ruby brilliant cut diamond 18K gold stud drop shaped earrings
Located in Delhi, DL
purity- 18K Metal color- Yellow gold Gemstone- Ruby Gemstone origin- Natural Gemstone weight- 1.63cts
Category

2010s Indian Contemporary Stud Earrings

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Natural Ruby Diamond Ring in 18k Gold
Located in jaipur, IN
stunning, designer-made Ring is crafted from 18-carat white gold and features a ruby gemstone set with a
Category

2010s Indian Fashion Rings

Materials

Diamond, Ruby, 18k Gold

Vintage Dainty Ruby Diamond Pinky Ring
Located in Montgomery, AL
Cut Red Ruby Gemstone: Estimated Weight: 0.5 Carat 32 - Old Cut Diamonds; GH Color; SI Clarity
Category

Vintage 1920s Art Deco Cocktail Rings

Materials

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

18K Yellow Gold 1.06ct Diamond and Ruby Ring MF08-101725
By LB Exclusive
Located in Southampton, PA
at the center, while Ruby gemstones totaling 1.45 carats add an exciting pop of color. Bold and
Category

21st Century and Contemporary Cocktail Rings

Materials

Ruby, Diamond, 18k Gold, Yellow Gold

Geometric Ruby Earrings 14K Gold .55 Carat Emerald Cut Ruby in Stud Style, July
By Five Star Jewelry
Located in Austin, TX
a richly textured beaded frame. These rubies are natural, genuine gemstones, verified by graduate
Category

21st Century and Contemporary American Modern Stud Earrings

Materials

Ruby, 14k Gold, Gold, Yellow Gold

Ruby and diamond tennis bracelet 18k yellow gold
Located in London, GB
of princess cut ruby gemstones and round brilliant cut diamonds all mounted in 18ct yellow gold. Ruby
Category

21st Century and Contemporary European Art Deco Tennis Bracelets

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

18K Yellow Gold 0.87ct Diamond and Ruby Ring
By LB Exclusive
Located in Southampton, PA
marquise-cut Ruby gemstones totaling 1.91 carats add color, dimension, and movement. Ideal for any occasion
Category

21st Century and Contemporary Cluster Rings

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Oval 0.65ct Natural Ruby Set in Platinum Solitaire Diamond Ring
Located in London, GB
This beautiful ring set with oval 0.65ct natural ruby gemstone in platinum ring setting with 2
Category

2010s British Solitaire Rings

Materials

Diamond, Ruby, Platinum

Natural Ruby 0.31cts Earring in 18k Gold
Located in jaipur, IN
elegant earrings are crafted in luxurious 18-carat gold, beautifully adorned with delicate ruby gemstones
Category

2010s Indian Stud Earrings

Materials

Ruby, 18k Gold

Ruby Band Ring, 19 Rubies Adorned in Yellow Gold, Minimal Stackable Band Sizable
By Five Star Jewelry
Located in Austin, TX
Quality: 14k Yellow Gold Gemstone: Ruby Gemstone Number: 19 Gemstone Shape: Round Gemstone Color: Ruby Red
Category

2010s American Contemporary Band Rings

Materials

Ruby, 14k Gold, Yellow Gold

Art Deco Pendant with diamonds Italian ruby and pearls in 14k Yellowgold
Located in Berlin, BE
of sophistication to this already breathtaking pendant. Adorned with radiant Italian ruby gemstones
Category

Vintage 1970s French Art Deco Pendant Necklaces

Materials

Diamond, Pearl, Ruby, Gold, 14k Gold, Yellow Gold, 18k Gold

Natural Diamond Ruby Ring in 18k Gold
Located in jaipur, IN
stunning, designer-made ring is crafted from 18-carat gold and features a ruby gemstone set with a diamond
Category

21st Century and Contemporary Asian Fashion Rings

Materials

Diamond, Ruby

0.88 Carat Oval-Cut Ruby 14K Yellow Gold Stud Earring
Located in New York, NY
Each of these earrings features a single oval-cut Thai ruby gemstone in a four-prong setting. Style
Category

20th Century Chinese Art Deco Stud Earrings

Materials

Ruby, 14k Gold, Yellow Gold

IGI certified Natural ruby brilliant cut diamond 14K gold stud round earrings
Located in Delhi, DL
- 90 Metal- Solid Gold Metal purity- 14K Metal color- Yellow gold Gemstone- Ruby Gemstone origin
Category

2010s Indian Contemporary Stud Earrings

Materials

Diamond, Ruby, Yellow Gold, 14k Gold

1915 Art Deco 1 Carat Diamond and Ruby Rooster Brooch Pin, Platinum
Located in Hicksville, NY
: Accent Ruby gemstone (eye of rooster) Made in 1915, Art Deco era Diamonds are entirely prong set There
Category

Vintage 1910s Unknown Art Deco Brooches

Materials

Ruby, Diamond, Platinum

Natural Ruby Diamond Bracelet in 18k Gold
Located in jaipur, IN
stunning, designer-made Bracelet is crafted from 18-carat gold and features a ruby gemstone set with a halo
Category

2010s Indian Tennis Bracelets

Materials

Diamond, Ruby, 18k Gold

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Ruby Gemstone For Sale on 1stDibs

Find the exact ruby gemstone you’re shopping for in the variety available on 1stDibs. Every item for sale was constructed with extraordinary care, often using gold, 18k gold and yellow gold. Our collection of these items for sale includes 2845 vintage editions and 5923 modern creations to choose from as well. You’re likely to find the perfect ruby gemstone among the distinctive items we have available, which includes versions made as long ago as the 18th Century as well as those produced as recently as the 21st Century. Creating a ruby gemstone has been a part of the legacy of many jewelers, but those produced by Bochic, VR Jewels and Unbranded are consistently popular. See these pages for a round cut iteration of this accessory, while there are also oval cut cut and brilliant cut cut versions available here, too. When shopping for a ruby gemstone, you’ll find that there are less available pieces for unisex or men today than there are for women.

How Much is a Ruby Gemstone?

The price for a ruby gemstone starts at $1 and tops out at $6,500,000 with these rings, on average, selling for $3,007.

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.