Santagostino Colorful Flower Buquet Brooch/Pendant
Located in New York, NY
Santagostino Colorful Flower Buquet Brooch/Pendant In 18k White Gold. This radiant brooch/pendant
Diamond, Pearl, 18k Gold
Santagostino Multigem And Diamond Floral Earrings
Located in New York, NY
Santagostino Multigem And Diamond Floral Earrings In 18k White Gold. Each off the earrings features
Diamond
Large Floral Santagostino Gemstone and Diamond 18 Karat Pendant Necklace
Located in Pikesville, MD
Circa 1980 from the exclusive and unique Italian jewelry designer Santagostino, known for their
Amethyst, Aquamarine, Citrine, Diamond, Cultured Pearl, Peridot, Quartz,...
18ct Yellow White & Rose Gold Santagostino Caribbean Reef Necklace
Located in Cape Town, ZA
This Absolutely Immaculately Santagostino Caribbean Reef Necklace Set in 18ct Yellow, White & Rose
Aquamarine, Coral, White Diamond, Yellow Diamond, Pink Diamond, Emerald,...
Large Floral Santagostino Gemstone and Diamond 18 Karat Pendant Necklace
Located in Pikesville, MD
Circa 1980 from the exclusive and unique Italian jewelry designer Santagostino, known for their
Amethyst, Citrine, Diamond, Emerald, Pearl, Quartz, Sapphire, Topaz, 18k...
Santagostino Floral Earrings with Pearls, Diamonds and Gemstones
Located in Pikesville, MD
Authentic Santagostino Gioielli fine Italian colorful art jewelry. Distinctive design using
Citrine, Coral, White Diamond, Emerald, Cultured Pearl, Quartz, Ruby, Go...
$5,398
H 0.27 in W 0.71 in L 1.69 in
1.52 Carat Aquamarine and 2.92 Carat Diamond, 18k White Gold Double Clip Brooch
Located in Jesmond, Newcastle Upon Tyne
A stunning, fine and impressive antique 1.52 carat aquamarine and 2.92 carat diamond, 18 karat white gold and platinum set double clip brooch; part of our antique 1920s jewelry colle...
Aquamarine, Diamond, White Gold, Platinum
$2,890
W 1 in L 2.2 in
English Vintage 18 Karat White Gold Diamond 1 Carat Flower 2.2 Inch Long Brooch
Located in New York, NY
Introducing our exquisite 18 karat white gold diamond flower brooch pin, a timeless piece that exudes elegance and sophistication. Crafted with meticulous attention to detail, this s...
Diamond, White Gold, 18k Gold, Gold
Estate Cartier Diamond and Platinum Bow Pin, Circa 1940's-1950's.
By Cartier
Located in New Orleans, LA
Classic Estate 1940's-1950s platinum bow brooch signed by Cartier, containing approximately 7 carats total weight of round brilliant and baguette cut diamonds.
Diamond, Platinum
BVLGARI Spiga Diamond Pink Rubellite Heart Yellow Gold 3-Row Adjustable Ring
By Bulgari
Located in New York, NY
This stunning ring from Bulgari's iconic Spiga collection features a flexible 3-row design crafted in 18k yellow gold and set with a heart-shaped pink rubellite and brilliant-cut ro...
Diamond, Yellow Gold
Vintage Cartier 18K Turquoise, Emerald, and Diamond Owl Brooch #17761
By Cartier
Located in Washington Depot, CT
Vintage Cartier 18K Turquoise, Emerald and Diamond Owl Brooch This exquisite brooch by Cartier features a cabochon turquoise body, cabochon emerald eyes and 6 round brilliant cut di...
Diamond, Emerald, Turquoise, 18k Gold, Yellow Gold
Vintage Cartier Aquamarine 18 Karat Yellow Gold Single Stone Ring, Circa 1960
By Cartier
Located in London, GB
A vintage Cartier aquamarine 18 karat yellow gold single stone ring, circa 1960 This ring is set with an impressive emerald cut aquamarine of 8.77 carats approximately in a half bez...
Aquamarine, Gold, 18k Gold, Yellow Gold
Emerald and Diamond Cuff Bracelet Art Déco Design by Ella Gafter
By Ella Gafter
Located in New York, NY
The emerald and diamond cuff bracelet features 7 magnificent emerald cut emeralds of Zambian origin for a total of 23.63 carats. They show what may be called a perfect emerald color,...
Diamond, White Diamond, Emerald, Onyx, 18k Gold, White Gold
$42,000
W 1.38 in L 14.97 in
Extraordinary Estate Yvel Multi-Colored Baroque Pearl Diamond 18K Gold Necklace
By Yvel
Located in New York, NY
The mesmerizing power of pearls is legendary. Pearls were and continue to be the most valuable of jewels- well documented in Royal portraits - Queen Elizabeth I, King Ferdinand V, In...
Diamond, Pearl, Gold, 18k Gold
Retro Starburst Gold Brooch
Located in Darnestown, MD
Wonderfully Retro Sunburst brooch in 14 karat rose gold. The brooch has five round brilliant cut diamonds with a total weight of approximately .84 carats; G color. Ten round rubies w...
Diamond, Ruby, 14k Gold
Verdura Petite Diamond 2.25cttw Leaf Brooch
Located in New York, NY
This exquisite Verdura Petite Diamond Leaf Brooch in 18K yellow gold is a stunning representation of nature-inspired elegance. Measuring 6 cm in length, the brooch is beautifully des...
Diamond, 18k Gold, Yellow Gold
Sixties Sapphire-set Bracelet Rud Murbach, Zurich
Located in Litchfield, CT
Circa 1960s, 18k, by Rud Murbach, Zurich, Switzerland. Charming, cheerful, and chic, this lovely flower bracelet is a visual ray of sunshine! Each flower is set with a brilliant co...
Sapphire, 18k Gold, Yellow Gold
$85,000Sale Price|66% Off
NWT $250, 000 Rare Fancy 18KT Gold Gorgeous Ceylon Sapphire Diamond Necklace
Located in New York, NY
A Rare 18KT White Gold Ceylon Sapphire Diamond Necklace. Necklace is comprised of Finely Set Glittering Gorgeous Ceylon Sapphire Bracelet and adorned with Sparkling Round Diamonds!! ...
Diamond, Sapphire, Gold, 18k Gold
$6,318Sale Price|20% Off
H 0.47 in W 1.58 in L 2.01 in
Art Nouveau 1910 Red Enamel Orchid Brooch In 18Kt Yellow Gold With VS Diamonds
Located in Miami, FL
Art nouveau enamel Orchid pendant-brooch. An exceptional, oversized and three-dimensional pendant brooch, created in America during the Edwardian and the Art Nouveau periods, back i...
Diamond, White Diamond, Gold, 18k Gold, Yellow Gold, Enamel
GIA Certified Natural Tanzanite Bead Necklace 12417
By Unbranded
Located in New York, NY
GIA Natural Tanzanite Bead Necklace. Report 1236075999 14mm-9.8mm Blue violet 30 inches length $36000 Appraisal to accompany
Tanzanite
Cartier Citrine, Onyx and Diamond Sailboat Brooch
By Cartier
Located in Weston, MA
It is said that a brooch is the purest expression of the jeweler’s art. In this buoyant Cartier piece the careful cutting of the citrines captures the essence of a boat under full sa...
Citrine, Diamond, Onyx, 18k Gold, Yellow Gold
Sold|$14,988
H 2 in W 1.2 in
Vintage 18k Gold GIA Burma No Heat Ruby Emerald & Diamond Strawberry Pin Brooch
Located in Montclair, NJ
This truly magnificent vintage brooch that is very well crafted in solid yellow gold and platinum, features a truly jaw dropping strawberry design that is completely covered with top...
Diamond, Emerald, Ruby, 18k Gold
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 rings, vintage engagement rings or Art Deco engagement rings.
Shop antique and vintage diamond rings, diamond necklaces and other extraordinary diamond jewelry on 1stDibs.