1939 Art Deco Slim Wedding Anniversary Platinum Band Ring
Located in New York, NY
Width: 2.15 millimeter Hight 1.63mm Metal: Platinum Weight: 2.76 grams Hallmark: 900 PLAT, 100 IRID, the
Platinum
9.51 ctw No-Heat Pear-Shaped Blue Sapphire Ring in Platinum
By Unbranded
Located in Tysons, VA
appeal. Type: Cocktail Ring Era / Style: Mid-Century Metal: Platinum Metal Purity: Plat-900 Setting Style
Blue Sapphire, Platinum
Vintage 2.60ctw Pink Oval Sapphire VS2 Diamond Halo Ring Platinum
Located in McLeansville, NC
- Baguette - 0.40 Total Carats, Baguette Cut, H Color Metal: 900 Platinum Weight: 6.6 Grams Stamps: PT 900
Diamond, Sapphire, Platinum
Platinum Top Quality 6.12ctw Radiant Cut Large VVS2 F Diamond Eternity Band Ring
Located in Montclair, NJ
Clarity Total Carat Weight: 6.12 (approx.) Material: Solid .900+ Platinum Weight: 8.71 Grams Ring Size
Diamond, Platinum
Vintage Platinum 3.45ctw French Cut Diamond Engraved Work Channel Eternity Band
Located in Montclair, NJ
Diamonds- 3.45ctw (approx.) Material: Solid .900+ Platinum Weight: 5.1 Gram Ring Size: 6.0 (Fitted on a
Diamond, Platinum
Vintage Platinum 4.88ctw Oval Opal & Diamond Halo Large Cocktail Ring
Located in Montclair, NJ
- Prong Set - Nice White Color - 0.47ctw (exact) Total Carat Weight: 4.88 (exact) Material: Solid .900
Diamond, Opal, Platinum
$5,980
H 0.43 in W 1.7 in
Antique Art Deco Lorgnette Platinum Rose Cut Diamond Pendant Glasses Magnifier
Located in Montclair, NJ
(approx.) Material: Solid 900+ Platinum & Glass Weight: 32.39 Grams Width: 43.1mm (1.6") Height: 107.1mm
Diamond, Platinum
Platinum 5.2ctw High Quality Pink Tourmaline & Diamond Split Shank Ring
Located in Montclair, NJ
.900 Platinum (tested) - Stamped PT900 Weight: 14.15 Grams Ring Size: 5.5 (Fitted on a finger. We can
Diamond, Tourmaline, Platinum
Vintage Platinum 5.97ct Gia Blue Sapphire Three Stone Diamond Cocktail Ring
Located in Houston, TX
Gender: Ladies Metal Type: 900 Platinum Ring Size: 6.5 Width: 2.15 mm Weight: 5.17 grams
Diamond, Sapphire, Platinum
Platinum High Quality 1.37ctw Emerald Cut Aquamarine & Diamond Band Ring
Located in Montclair, NJ
Brilliant Color - 0.32ctw (exact) Total Carat Weight: 1.37 (exact) Material: Solid .900 Platinum (tested
Aquamarine, Diamond, Platinum
Platinum GIA 3.66ctw Cabochon Colombian Emerald & Diamond Bubble Sides Ring
Located in Montclair, NJ
- 0.75ctw (exact) Total Carat Weight: 3.66 (exact) Material: Solid .900+ Platinum (tested) - Stamped PT900
Diamond, Emerald, Platinum
Platinum GIA 1.8ct Royal Blue Sapphire Round & Baguette Diamond Ring
Located in Montclair, NJ
(exact) Total Carat Weight: 1.8 (exact) Material: Solid .900 Platinum (tested) - Stamped PT900 Weight
Diamond, Sapphire, Platinum
1.77ct Fine Australian Black Opal & Diamond Platinum Halo Cocktail Ring
By Gems and Jewels UK
Located in Birmingham, GB
is fully hallmarked by UK assay office as 900 platinum to guarantee metal quality. All our jewellery
Opal, Black Opal, Diamond, Platinum
Antique Platinum Old Single Cut Diamond 7 Stone Pave Band Ring
Located in Montclair, NJ
Diamonds Total Carat Weight: 0.10 (approx.) Material: Solid .900 Platinum Weight: 2.05 Grams Ring Size
Diamond, Platinum
16.56 ctw Mid-Century Cushion Padparadscha Sapphire & Diamond Platinum Ring
Located in Tysons, VA
: Platinum Metal Purity: Plat-900 Setting Style: Prong Band Style: Plain Gemstone: Natural Padparadscha
Diamond, Sapphire, Pink Sapphire, Padparadscha Sapphire , Platinum
Solid Platinum Large 10.31ctw Cabochon Moonstone w/ Diamond Sides Ring
Located in Montclair, NJ
Brilliant White Color - 0.30ctw (exact) Total Carat Weight: 10.31 (exact) Material: Solid .900 Platinum
Diamond, Moonstone, Platinum
Platinum Flower Cluster ring. Diamond bezel set Daisy Flower bouquet band. Heavy
Located in Port Charlotte, FL
. Condition: Shows minimal signs of wear. 900 Platinum Details: 11.7 grams total weight 0.32ctw Diamonds
Platinum
Platinum 4.09ctw Long Emerald Cut Aquamarine & Diamond Split Shank Ring
Located in Montclair, NJ
: Solid .900 Platinum (tested) - Stamped PT900 Weight: 9.46 Grams Ring Size: 5.5 (Fitted on a finger. We
Aquamarine, Diamond, Platinum
Peter Suchy .33 Carat Diamond Platinum Wedding Band Ring
By Peter Suchy
Located in Stamford, CT
Platinum Stamped: PT 900 3.5 grams
Diamond, Platinum
Vintage Three Stone Diamond and Platinum Ring, circa 1970
Located in London, GB
, mounted in 900 platinum, made in the USA, circa 1970. Accompanied by Gemmological Certification Services
Diamond, Platinum
Vintage Platinum 6.39ctw Omphacite Burma Jade & Diamond Ballerina Cocktail Ring
Located in Montclair, NJ
+ Platinum - Stamped .900 Weight: 13.80 Grams Ring Size: 6.5 (Fitted on a finger. We can custom size this
Diamond, Jade, Platinum
Antique French Platinum & Gold 2.20ctw Old Diamond Mosaic Pin Brooch
Located in Montclair, NJ
; Bezel Set - Nice Brilliant White Diamonds - 2.20ctw (approx.) Material: Solid .900 Platinum w/ 18k
Diamond, Gold, 18k Gold, White Gold, Platinum
Platinum 1.62 carat Ruby Ring with .98cttw of Diamonds
Located in Big Bend, WI
Top color natural earth mined red ruby weighing 1.62 carats set in 900 platinum. Japanese Gem
Diamond, Ruby, Platinum
Antique Platinum 1.0ctw GIA Certified Old European Prong Diamond Stud Earrings
Located in Montclair, NJ
Below for Complete Info ** Total Carat Weight: 1.00 (exact) Material: Solid 900 Platinum w/ Solid 950
White Diamond, Platinum
1.94 Carat Basaltic Sapphire 1.07 Carat Diamond Platinum Ring Circa 1970
Located in Jesmond, Newcastle Upon Tyne
. This interior of the shank is hallmarked with the maker's mark (KM) and platinum mark ( 900 ); this
Diamond, Sapphire, Platinum
Platinum 1.47ctw Oval Royal Blue Sapphire Baguette Diamond Accents Sides Ring
Located in Montclair, NJ
Nice Color - 6.7x5.3mm - 1.22ct (exact) Total Carat Weight: 1.47 (exact) Material: Solid .900 Platinum
Diamond, Sapphire, Platinum
$38,523
W 0.17 in L 7.33 in
Modern Emerald 6.37 Carats, Diamond 5.05 Carats and Platinum Line Bracelet
Located in London, GB
, with a safety catch, mounted in 900 standard platinum. Manufacturers total given weights engraved on
Diamond, Emerald, Platinum
Antique Art Deco Platinum Sectioned Engraved Eternity Band Ring Size 6.5
Located in Montclair, NJ
Material: Solid .900+ Platinum Weight: 3.22 Grams Ring Size: 6.5 ( fitted on finger, can not be
Platinum
Antique Platinum 1.57ct Old European Cut Diamond Accented Engagement Ring
Located in Houston, TX
shank. The metal was tested and determined to be platinum. Engraved with "900 PLAT IRID". In excellent
Diamond, Platinum
GIA Cat’s Eye Chrysoberyl & Diamond Cocktail Ring in Platinum- GIA 6237879480
Located in Bloomington, MN
ring is crafted in 900 platinum and features a 3.98-carat cat’s eye chrysoberyl as the center stone
Chrysoberyl, Diamond, Cat’s Eye, Platinum
Art Deco Diamond Platinum Ladies Wrist Watch Mined 1ct 1930's Custom Dial
Located in Dearborn, MI
Watch's Specs Size: 8 Inch Metal: Platinum Stamp: 900 PLAT 100 IRID **We strive to provide the most
Diamond, Platinum
Platinum Diamond Eternity Band Ring Size 6-3/4
Located in Mount Kisco, NY
faceted .10 carat fine white diamonds, 2.3 carats TW. In ring size 6-3/4. Crafted in .900 Platinum
Diamond, Platinum
Men’s Platinum and 18K White Gold Diana Wedding Band Ring
Located in Houston, TX
grams One man's Rhodium plated 900 platinum and 18K white gold wedding band with a half-round shank
Gold, 18k Gold, White Gold, Platinum
Classic Platinum 2ctw Round Cut Diamond Wedding Stack Eternity Band Ring
Located in Montclair, NJ
- SI1/SI2 Clarity - 2.0ctw (approx.) Material: Solid .900+ Platinum Weight: 6.25 Gram Ring Size: 6.0
Diamond, Platinum
Antique Platinum .20ctw Single Cut Channel Set Diamond Milgrain Band Ring
Located in Montclair, NJ
- 0.20ctw (approx.) Material: Solid .900+ Platinum Weight: 2.70 Gram Ring Size: 6.5 (fitted on finger, we
Diamond, Platinum
$2,998
H 0.46 in W 0.78 in L 15.5 in
Platinum Tahitian Pearl & Diamond Slide Pendant on 15.5" Cable Link Necklace
Located in Montclair, NJ
(approx.) Material: Solid .900+ Platinum Total Weight: 11.98 Grams Chain Type: Cable Link Chain Length
Diamond, Pearl, Platinum
GIA Certified .87 Carat Pink Sapphire Platinum Engagement Ring
Located in Stamford, CT
sizable 900 Platinum Tested: Platinum Stamped: PT 900 Hallmark: NK 6.6 grams Width at top: 7.02mm Height
Diamond, Pink Sapphire, Sapphire, Platinum
Platinum Diamond Art Deco Ladies Watch Single Ct .18ctw Vintage Quartz Converted
Located in Greensboro, NC
: 900 Platinum 100 Iridium, J.F. Co, Niagra, Swiss Condition: Pre-Owned
Diamond, Quartz, Platinum
Platinum GIA 10.32ctw Cabochon Cat's Eye & Diamond Large Substantial Ring
Located in Montclair, NJ
) Material: Solid .900 Platinum (tested), PT900 (stamped) Weight: 13.16 Grams Ring Size: 6.5 (Fitted on a
Beryl, Diamond, Platinum
Platinum Oval Blue Star Sapphire Step Cut Diamond Sides Open Gallery Ring
Located in Montclair, NJ
Color - VS1 Clarity - 0.24ctw (exact) Total Carat Weight: 6.24 (exact) Material: Solid .900 Platinum
Diamond, Sapphire, Platinum
Wonderful Platinum 7.52ctw Fiery Jelly Opal w/ Diamond Halo Statement Ring
Located in Montclair, NJ
- 1.11ctw (exact) Total Carat Weight: 7.52 (exact) Material: Solid .900 Platinum (tested) - Stamped PT900
Diamond, Opal, Platinum
Antique Edwardian Platinum 14K White Gold 1.09ct Diamond Filigree Cocktail Ring
Located in Houston, TX
Gender: Ladies Metal Type: 14K White Gold & 900 Platinum Ring Size: 5 Width: 1.55 mm Weight
Diamond, Gold, 14k Gold, White Gold, Platinum
Antique Art Deco Platinum Old European Diamond and Sapphire Stud Dangle Earrings
Located in Houston, TX
Gender: Ladies Metal Type: 900 Platinum Length: 2.50 inches Width: 15.30 mm Weight: 11.86 grams
Diamond, Sapphire, Platinum
$3,998
H 0.57 in W 0.58 in L 16 in
Tiffany & Co. Platinum 0.52ctw Diamond Maltese Cross Pendant on 16" Necklace
By Tiffany & Co.
Located in Montclair, NJ
- F/G Color Total Carat Weight: 0.52 (exact) Material: Solid .900+ Platinum Weight: 5.90 Grams Chain
Diamond, Platinum
7.74ct Fancy Fantasy Cut Light Blue Aquamarine Diamond Platinum Pendant Necklace
By Gems and Jewels UK
Located in Birmingham, GB
unique aquamarine is set in a beautiful 900 platinum pendant with diamonds accents. Featuring 0.10 carat
Aquamarine, Diamond, White Diamond, Platinum
$44,000Sale Price|20% Off
JB Star Platinum & Emerald Cut Diamond Halo Eternity Band 8.50ctw
By JB Star
Located in Newport Beach, CA
/clarity from F-G/VS-SI, all set in .900 platinum. The ring is size 6.75 and measures 8.3mm wide. It is in
Diamond, Platinum
Antique Art Deco Platinum 1.96ct Gia Royal Blue Sapphire Diamond Cocktail Ring
Located in Houston, TX
Gender: Ladies Metal Type: 900 Platinum Ring Size: 6.5 Width: 1.35 mm Weight: 3.27 grams
Diamond, Blue Sapphire, Platinum
Antique Deco Diamond Eternity Ring Vintage Platinum Estate Fine Jewelry
Located in Torrance, CA
Elegant vintage Art Deco era eternity ring (circa 1920s to 1930s), crafted in 900 platinum. 34
Diamond, Platinum
Antique Platinum 3.52ct Old European Cut Accented Diamond Engagement Ring
Located in Houston, TX
metal was tested and determined to be platinum. Engraved with "900 PLAT". In excellent condition
Diamond, Platinum
Platinum 3.09ct GIA Elongated Cushion Cut Diamond Solitaire Engagement Ring
Located in Montclair, NJ
Below for Complete Info ** Total Carat Weight: 3.09 (exact) Material: Solid .900+ Platinum Weight: 7.28
Diamond, Platinum
1.63ct GIA Certified Fine Colombian Emerald & Diamond Platinum Seven Stone Ring
By Gems and Jewels UK
Located in Birmingham, GB
quality natural diamonds. All set in a classic 900 platinum five stone stone ring. Ring size UK P - US
Diamond, White Diamond, Emerald, Platinum
Handmade Platinum Certified Oval Sapphire & Baguette Diamond Engagement Ring
Located in Montclair, NJ
Weight: 2.85 (approx.) Material: Solid 900 Platinum Weight: 4.47 Grams Ring Size: 6.0 (We can custom
Diamond, Sapphire, Platinum
Vintage Classy Platinum 5.92ct Exceptional Color Opal Diamond Halo Cocktail Ring
Located in Montclair, NJ
Clarity - 0.69ctw (exact, stamped) Total Carat Weight: 5.92 (exact) Material: Solid .900 Platinum Weight
Diamond, Opal, Platinum
1.64ct GIA Certified Fine Colombian Emerald & Diamond Platinum Three Stone Ring
By Gems and Jewels UK
Located in Birmingham, GB
carat total. These are very high quality natural diamonds. All set in a classic 900 platinum three
Diamond, White Diamond, Emerald, Platinum
1.17ct FINE Australian Black Opal & Baguette Diamond Five Stone Platinum Ring
By Gems and Jewels UK
Located in Birmingham, GB
as 900 platinum to guarantee metal quality. All our jewellery is posted safely and securely in
Diamond, Opal, Black Opal, Platinum
1.53ct GIA Certified Fine Colombian Emerald & Diamond Platinum Five Stone Ring
By Gems and Jewels UK
Located in Birmingham, GB
quality natural diamonds. All set in a classic 900 platinum five stone stone ring. Ring size UK M - US
Diamond, White Diamond, Emerald, Platinum
Classic MICHAEL BEAUDRY Platinum GIA Certified 1.02-ct Diamond Ring
By Michael Beaudry
Located in New York, NY
& SI clarity. 2 side diamonds & 8 accent diamonds on the shoulders. Filigree motives in 900 Platinum
Diamond, Platinum
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.
Ancient Egyptians referred to the vibrant stone as the “gem of the sun.”
There are many ways to showcase a diamond, from traditional prongs to a smooth, streamlined bezel. Here’s everything you need to consider.
The vintage bombé ring is bursting with color and timeless style.
Zircon is a magnificent and underrated natural gemstone that has been worn and adored for centuries.
Givers of fine gems enjoy surprise more than receivers, and women more than men. Find out what else our survey of 3,000 Americans revealed.
If diamonds don’t seem right, what about a magnificent sapphire, ruby or emerald?
Accounting for just 1 percent of all diamonds, these marvels of nature are exceedingly rare and gorgeously complex.
Learn about these antique jewelry styles, then choose a design that speaks to you.