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Diamond Quadrillion

Quadrillion Invisibly Set Diamond 1.36Ct & Ruby 4.31Ct Ring
By Bez Ambar
Located in New York, NY
Under the trademark Quadrillion, Bez Ambar created the modern square shaped princess cut diamond
Category

1990s American Contemporary Engagement Rings

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Recent Sales

18 Karat Ruby and Diamond Mounting Ring
By Quadrillion Diamond Company
Located in Pikesville, MD
Made with superior quality by invisibly set fine jewelry designer, Quadrillion diamond company
Category

1990s American Modern Bridal Rings

Materials

White Diamond, Ruby, 18k Gold, Yellow Gold

18 Karat Wide Blue Sapphire and Diamond Modern Band
By Quadrillion Diamond Company
Located in Pikesville, MD
generous sparkle. Made by Quadrillion Diamond Company, experts in invisibly set creations, this 18 karat
Category

Early 2000s American Modern Fashion Rings

Materials

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

18 Karat Art Deco Inspired Diamond Ring 5.47 Carat Total Weight
By Quadrillion Diamond Company
Located in Pikesville, MD
Beautifully refined 18 karat yellow gold Art Deco inspired geometric diamond ring featuring a 1.01
Category

1990s American Art Deco Fashion Rings

Materials

White Diamond, 18k Gold, Yellow Gold

Quadrillion 18k Gold Emerald Cut Diamond Solitaire & Princess Pyramid Sides Ring
By Quadrillion Diamond Company
Located in Montclair, NJ
This stunning and uniquely designed diamond ring is designed by Quadrillion and crafted in solid
Category

21st Century and Contemporary Solitaire Rings

Materials

Diamond, Emerald, 18k Gold, Yellow Gold

Quadrillion 18k Yellow Gold 1.84cwt Channel Set Diamond Wedding Band Ring
By Quadrillion Diamond Company
Located in Montclair, NJ
--Stone(s):-- (23) Natural Genuine Diamonds - Square Cut w/ Cut Corners- Channel Set - E/F Color
Category

21st Century and Contemporary Wedding Rings

Materials

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

18 Karat Yellow Gold Cultured Pearl Diamond Ring
By Quadrillion Diamond Company
Located in Coral Gables, FL
18 Karat Yellow Gold Ring From Designer Quadrillion. The Ring Features a 7mm Round White Pearl
Category

Vintage 1980s Solitaire Rings

Materials

Diamond, Cultured Pearl, 18k Gold, Yellow Gold

DeBeers Award Winner 4.50 ctw Quadrillion Cut Diamond Engagement Ring
By Bez Ambar
Located in Santa Barbara, CA
natural diamonds, in a lesser seen quadrillion cut, with phenomenal color and clarity. The Quadrillion
Category

Vintage 1980s Contemporary Wedding Rings

Materials

Diamond, Gold, 18k Gold, Yellow Gold

Natural Blue Star Sapphire Diamond Brooch, Diamonds 11.75 Carats
Located in Palm Desert, CA
, VVS-1 to VVS-2 in clarity, G-H in color. Eighteen channel set quadrillion cut diamonds, 1.00 carat, VS
Category

Vintage 1940s American Brooches

Materials

Diamond, Star Sapphire, 18k Gold, White Gold

GIA Certified VS2 4.13 Carat Princess Diamond Ring With 2 Carat Diamond Sides
Located in Tustin, CA
certified, "Quadrillion" princess cut diamond in the center weighing 4.13 carats, with a clarity of VS2 and
Category

21st Century and Contemporary Unknown Contemporary Engagement Rings

Materials

White Diamond, Diamond, Platinum

Tiffany & Co. Ruby and Diamond Bangle
By Tiffany & Co.
Located in Beverly Hills, CA
. 16 Rubies adorn the top weighing 1.74cts and 12 quadrillion diamonds are set in-between weighing
Category

Late 20th Century American Retro Bangles

Materials

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

Tiffany & Co Diamond Ruby Yellow Gold Line Tennis Bracelet
By Tiffany & Co.
Located in Holland, PA
18k Yellow Gold Diamond And Ruby Line Tennis Bracelet by Tiffany & Co. With 40 quadrillion cut
Category

1990s American Tennis Bracelets

Materials

Diamond, Ruby, Yellow Gold

Black, Starr & Frost GIA Certified Natural Fancy Pink Oval Diamond Ring 2.30ctw
By Black, Starr & Frost
Located in Tustin, CA
Natural Fancy Pink Oval Modified Brilliant cut center diamond accented by 1.19ctw F-G/VVS Quadrillion cut
Category

1990s American Modern Engagement Rings

Materials

White Diamond, Pink Diamond, Platinum

Bez Ambar 2.00 Carat Quad Diamond Earrings in 18 Karat Yellow Gold
By Bez Ambar
Located in Carmel, IN
square shaped with baguette & quadrillion cut diamonds, totaling 2.00 carats. It is crafted in 18k yellow
Category

2010s American Art Deco Stud Earrings

Materials

Diamond, White Diamond, 18k Gold, Yellow Gold

Quadrillion Brand 18 Yellow Gold Ring with 10.82ct Precious Topaz and Diamonds
By Quadrillion Diamond Company
Located in Palm Beach, FL
. Set with one 10.82ct oval Imperial Topaz* flanked by twenty quadrillion cut diamonds on the ring's
Category

Late 20th Century American Modern Cocktail Rings

Materials

Diamond, Topaz, 18k Gold, Yellow Gold

Quadrillion 18kt Yellow Gold 1.19ct Diamond Heart Pendant Necklace
By Bez Ambar
Located in New York, NY
Under the trademark Quadrillion, Bez Ambar created the modern square shaped princess cut diamond
Category

1990s American Contemporary Pendant Necklaces

Materials

Diamond, 18k Gold, Yellow Gold

Tiffany & Co. 18 Karat Yellow Gold 12.30 Carat Quadrillion Diamond Line Bracelet
By Bez Ambar
Located in New York, NY
Under the trademark Quadrillion, Bez Ambar created the modern square shaped princess cut diamond
Category

1990s American Contemporary Tennis Bracelets

Materials

Diamond, 18k Gold, Yellow Gold

Huge 11.11 Carat Princess Diamond Ring With 2.08 Carat Diamond Side Stones
Located in Tustin, CA
diamond ring features in the center one "Quadrillion" princess cut diamond weighing 11.11 carats, with a
Category

21st Century and Contemporary Unknown Contemporary Three-Stone Rings

Materials

Diamond, White Diamond, 14k Gold, White Gold

Emerald-Cut Sapphire and Rare Quadrillion-Cut Diamonds Gold Ring
Located in Metairie, LA
Breathtaking 18k Gold Ring with Emerald-Cut Sapphire and Rare Quadrillion-Cut Diamonds An Estate
Category

Late 20th Century Cocktail Rings

Materials

Diamond, Sapphire

Bez Ambar Quadrillion Cut White Gold 11.88 Carat Diamond Bracelet
By Bez Ambar
Located in Columbia, MO
tennis bracelet features 11.88 carats of sparkling diamonds. DETAILS: 11.88CTW princess diamonds 18K
Category

21st Century and Contemporary Tennis Bracelets

Materials

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

18 Karat White Gold and Diamond Hanging Earrings
Located in New York, NY
A pair of 18 karat white gold earrings featuring princess cut and quadrillion cut diamonds. Total
Category

21st Century and Contemporary Contemporary Dangle Earrings

Materials

Diamond, 18k Gold

Bez Ambar Quadrillion Princess Cut Diamond Platinum Tennis Bracelet
By Bez Ambar
Located in Columbia, MO
signature Quadrillion princess cut diamonds that have a combined total weight of 3.92 carats. Bez Ambar is
Category

21st Century and Contemporary Tennis Bracelets

Materials

White Diamond, Diamond, Platinum

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Emilio Jewelry Gia Certified 55.00 Carat Diamond Necklace
By Emilio!
Located in New York, NY
From the Museum Vault At Emilio Jewelry located on New York's Iconic Fifth Avenue, A magnificent necklace hand made in the Emilio Atelier, the focal point of this necklace is the Cen...
Category

21st Century and Contemporary Choker Necklaces

Materials

Diamond

Handcraft Princess Cut Diamonds 18 Karat Yellow Gold Band Ring
By SCALA GIOIELLI
Located in Marcianise, IT
This stunning ring is crafted in 18kt yellow gold, combining timeless elegance with modern sophistication. The design features a striking array of princess-cut diamonds, with a total...
Category

21st Century and Contemporary Italian Artisan Band Rings

Materials

Diamond, 18k Gold, Yellow Gold

Art Deco Colombian Square Cut Emerald Diamond Platinum Three-Stone Ring
Located in Greenwich, CT
You will truly "go green" with this extraordinary AGL and Gubelin certified Colombian untreated 2.78 carat square cut emerald ring attributed to the most ancient of mines. With an e...
Category

Vintage 1920s American Art Deco Engagement Rings

Materials

Emerald, White Diamond, Platinum

Victorian Natural Pearl and Diamond Cluster Necklace
Located in London, GB
A Victorian natural pearl and diamond necklace, the twelve graduated cluster motifs each centred with natural bouton pearls measuring from 5.6 mm to 9 mm, within a surround of old br...
Category

Antique 1880s Link Necklaces

Materials

Diamond, Pearl, Natural Pearl, 18k Gold, Yellow Gold, Silver

Cartier Monture Emerald Cut Diamond And Sapphire Ring
By Cartier
Located in New Orleans, LA
Spectacular gems distinguish this magnificent bypass ring by the famed jeweler Cartier. The remarkable 8.26-carat emerald cut sapphire is certified by the American Gemological Labs (...
Category

21st Century and Contemporary French Modern Fashion Rings

Materials

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

Fabergé Collection Three Colors of Love Gubelin Cert 8.27 Carat Emerald Ring
By Fabergé
Located in Montreux, CH
Three Colours of Love Emerald Ring 103RG180/1 The Three Colours of Love Collection exemplifies ‘The Life in Colour’, seamlessly fusing extraordinary coloured gemstones, artistic in...
Category

2010s British Belle Époque Solitaire Rings

Materials

Diamond, Emerald, 18k Gold

Picchiotti 18KT Yellow Gold Baguette Ruby 4.07Ct & Diamond 2.36CT Band Ring
By Picchiotti
Located in New York, NY
Designed by master craftsman Giuseppe Picchiotti . Cellini NYC presents this 18 karat yellow gold band ring beautifully set with a center row of baguette cut diamonds , and 2 rows o...
Category

1990s Italian Contemporary Band Rings

Materials

Ruby, Diamond, Yellow Gold, 18k Gold

Van Cleef & Arpels Paris No-Heat Burma Sapphire Ring
By Van Cleef & Arpels
Located in New York, NY
Created in the late 1930s by Van Cleef & Arpels Paris, this Burma sapphire and diamond ring is mounted in platinum. The ring centers three vertically-set cushion-cut sapphires, weigh...
Category

Vintage 1930s French Art Deco Cluster Rings

Materials

Diamond, Sapphire, Platinum

Spectra Fine Jewelry GIA Certified 6.02 Carat Diamond Engagement Ring
By Spectra Fine Jewelry
Located in New York, NY
Gaze upon this ring, and you're transported to a world of mesmerizing patterns, reminiscent of a kaleidoscope's allure. Though it doesn't shift like the optical wonder, the intricate...
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, 18k Gold, Yellow Gold

Damiani Diamond and Pearls Tiara
By Damiani
Located in Geneva, CH
Exceptional Tiara by Damiani. Diamonds, pearls Metal: white gold 18K (no rhodium plating). Diamonds weight: 41,50 carats color G-H clarity VVS-VS Japanese pearls: 9,60 grams. Total ...
Category

21st Century and Contemporary Italian Baroque More Jewelry

Materials

Diamond, Pearl, Gold, White Gold

Natural Unenhanced Burmese Ruby and Diamond Cluster Ring
Located in London, GB
Burmese ruby and diamond cluster ring. Set with an oval old cut natural unenhanced Burmese ruby to centre in an open back claw setting with an approximate weight of 2.43 carats, flan...
Category

Vintage 1950s Cluster Rings

Materials

Diamond, Ruby, Platinum

Modern Fabergé Charmeuse Créoles Frédéric Zaavy Diamants Antiques Earrings
By Fabergé
Located in Montreux, CH
Charmeuse Créoles Diamants Antiques Earrings 46EA69/1 Fabergé Treasures, a charismatic and diverse collection of jewellery and objects, frequently one-off, is inspired by the Fabergé...
Category

2010s British Belle Époque Drop Earrings

Materials

Diamond, 18k Gold

Diamond Ruby Platinum Cocktail Ring
Located in New York, NY
A beautiful cocktail ring decorated with a 2-carat emerald-cut diamond that's equivalent to K color, VVS2 clarity. The diamond is surrounded by tapered French-cut rubies and melee di...
Category

21st Century and Contemporary American Cocktail Rings

Materials

Diamond, Ruby, Platinum

Victorian Diamond Silver Gold Drop Stud Earrings, Antique, 1900s
Located in Beverly Hills, CA
Fabulous Victorian diamond drop stud earrings. Made of 14 karat (stamped) yellow gold and silver, the earrings feature two Old European cut diamonds, one is approximately 8.84-carat...
Category

Antique Early 1900s Unknown Victorian Drop Earrings

Materials

Diamond, 14k Gold, Silver, Yellow Gold

Roman Malakov 61.96 Carat Graduating Yellow and White Diamond Rivière Necklace
By Roman Malakov
Located in New York, NY
Unique and well crafted piece that showcases the two magnificent sides of diamonds. On one side, features color rich fancy yellow pear shape diamonds that graduates in size, set in f...
Category

21st Century and Contemporary American Contemporary More Necklaces

Materials

Diamond, Yellow Diamond, White Diamond, Yellow Gold, Platinum

SCARSELLI 6 Carat Fancy Vivid Yellow Diamond Necklace GIA Certified
By SCARSELLI
Located in New York, NY
Scarselli is featuring this 6.42 carat heart shaped Fancy Vivid Yellow color diamond and an A 0.51 carat light pink I2 heart shape mounted on a handmade platinum and 18 karats white ...
Category

2010s American Contemporary Pendant Necklaces

Materials

Pink Diamond, Yellow Diamond, 18k Gold, Platinum

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Diamond Quadrillion For Sale on 1stDibs

You are likely to find exactly the diamond quadrillion you’re looking for on 1stDibs, as there is a broad range for sale. Each design created in this style — which was crafted with great care and often made from 18k Gold, Gold and Yellow Gold — can elevate any look. Our collection of these items for sale includes 15 vintage editions and 3 modern creations to choose from as well. Making the right choice when shopping for a diamond quadrillion 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. A diamond quadrillion from Bez Ambar and Quadrillion Diamond Company — each of whom created a beautiful version of this treasured accessory — is worth considering. Today, if you’re looking for a princess cut version of this piece and are unable to find the perfect match, our selection also includes alternatives. There aren’t many items for men if you’re seeking a diamond quadrillion, as most of the options available are for women and unisex.

How Much is a Diamond Quadrillion?

Prices for a diamond quadrillion can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $2,500 and can go as high as $63,000, while this accessory, on average, fetches $7,975.

The Legacy of Diamond in Jewelry Design

Antique diamond rings, diamond tiaras and dazzling vintage diamond earrings are on the wish lists of every lover of fine jewelry. And diamonds and diamond jewelry are primarily associated with storybook engagements and red-carpet grand entrances — indeed, this ultra-cherished gemstone has a dramatic history on its hands.

From “A Diamond Is Forever” to “Diamonds Are a Girl’s Best Friend,” pop culture has ingrained in our minds that diamonds are the most desired, the most lasting and the most valuable gemstone. But what makes the diamond so special? Each stone — whether it’s rubies, sapphires or another stone — is unique and important in its own right. April babies might claim diamonds for themselves, but just about everyone wants this kind of sparkle in their lives!

There are several factors that set diamonds apart from other stones, and these points are important to our gem education.

Diamonds are minerals. They are made up of almost entirely of carbon (carbon comprises 99.95 percent; the remainder consists of various trace elements). Diamonds are the hardest gemstones, ranking number 10 on the Mohs Hardness Scale. Even its name, diamond, is rooted in the Greek adamas, or unconquerable. The only object that can scratch a diamond is another diamond. Diamonds are formed deep within the earth at very high temperatures (1,652–2,372 degrees Fahrenheit at depths between 90 and 120 miles beneath the earth’s surface) and are carried up by volcanic activity. Diamonds are quite rare, according to the Gemological Institute of America, and only 30 percent of all the diamonds mined in the world are gem quality.

In the 1950s, the Gemological Institute of America developed the 4Cs grading system to classify diamonds: clarity, color, cut and carat weight. Not all diamonds are created equal (there are diamonds, and then there are diamonds). The value of the diamond depends on the clarity (flawless diamonds are very rare but a diamond's value decreases if there are many blemishes or inclusions), color (the less color the higher the grade), cut (how the diamond’s facets catch the light, certain cuts of diamonds show off the stone better than others) and carat weight (the bigger, the better).

When you start shopping for a diamond engagement ring, always prioritize the cut, which plays the largest role in the diamond's beauty (taking the time to clean your diamond ring at least every six months or so plays a role in maintaining said beauty). And on 1stDibs, a range of buying guides can be found for those in the market for antique engagement ringsvintage engagement rings or Art Deco engagement rings

Shop antique and vintage diamond rings, diamond necklaces and other extraordinary diamond jewelry on 1stDibs.