Oscar Heyman, Platinum Diamond Earrings, Certificate
By Oscar Heyman
Located in New York, NY
brilliance. Crafted in PT950 platinum and featuring a classic floral design, they radiate sophistication and
Diamond, Platinum
Rare Tiffany & Co. Fleur de Lis Diamond Platinum Key Pendant Necklace
By Tiffany & Co.
Located in Birmingham, GB
are set in the dazzling, elegant key, on a fine 23 inch Tiffany and Co. 950 platinum chain. Stamped
Diamond, White Diamond, Platinum
Art Deco Emerald Diamond Bow Platinum Brooch, 1930
Located in Herzelia, Tel Aviv
Emeralds 1.30 Ct Diamonds Pt 950 (Platinum) Weight: 0.50 oz (14.2 gr) Length: 47 mm (1.9 inches)
Diamond, Emerald, Platinum
1.57ct Emerald & 0.23ct White Diamond Ring in Platinum
Located in Bucharest, Romania
PT950 platinum, the band offers exceptional strength, durability, and a naturally bright white finish
White Diamond, Emerald, Platinum
Sold|$22,750
GIA Diamond Engagement Ring 2.00ct
By GIA
Located in SYDNEY, NSW
Metal: PT950 Platinum Carat: 2.00ct Colour: F Clarity: VS2 Cut: Square Modified Cut Weight: 7.54 grams
Diamond, Platinum
Tiffany & Co. Platinum True Wedding Band Ring, 1.5mm, Size 6
By Tiffany & Co.
Located in New York, NY
This Tiffany & Co. Platinum True® Wedding Band Ring is crafted in Pt950 platinum with a sleek
Platinum
Tiffany & Co. Forever Platinum 4.4mm Wedding Band Ring Size 8.5, Box Included
By Tiffany & Co.
Located in New York, NY
measures 4.4 mm wide and weighs 7.8 grams. Crafted in PT950 platinum, it is engraved with the Tiffany & Co
Platinum
Sold|$12,300
Ruby Diamond Halo Flower Cocktail Ring 2.18ct TW
Located in Bucharest, Romania
Platinum PT950 ruby and diamond flower cocktail ring featuring a vivid 1.00-carat natural ruby at
Diamond, Ruby
Sold|$4,580
1ct White Diamond Drop Earrings
Located in Bucharest, Romania
These exquisite 1ct white diamond drop earrings are set in premium PT950 platinum, offering both
White Diamond
2ct Pink Sapphire Cocktail Ring with 1ct Emerald & 1ct White Diamond Halo in PT9
Located in Bucharest, Romania
, adding extra sparkle and luxury to this striking design. Crafted in PT950 platinum, known for its
White Diamond, Emerald, Pink Sapphire
Sold|$18,000
Ruby Drop Earrings with Diamonds
Located in Bucharest, Romania
PT950 platinum, the earrings are masterfully crafted with a bold, heavy design that exudes elegance and
White Diamond, Ruby, Diamond, White Gold
Tiffany & Co. .54 Ct Lucida Cut Diamond Engagement Ring G-H, VVS2-VS1 IGI Cert
By Tiffany & Co.
Located in New York, NY
production—combines brilliance with crisp, modern lines. Crafted in solid PT950 platinum, the ring weighs 4.0
Diamond, Platinum
2.30ct Emerald Pear & 1.22ct Diamond Halo Ring in Platinum PT 950
Located in Bucharest, Romania
This breathtaking 2.30ct pear-shaped emerald takes center stage in a stunning platinum PT 950
Diamond, Emerald, Platinum
Tiffany 0.12ct Diamond Solitaire Pendant Necklace Pt 950
By Tiffany & Co.
Located in Kobe, Hyogo
Item: Tiffany Diamond Solitaire Necklace Stone: Diamond Metal: Platinum 950 Chain Length: 15.74
Diamond, Platinum
Tiffany & Co Platinum PT950 Lucida Band
Located in Washington Depot, CT
, 8.8dwt. Marked © TIFFANY & CO PT 950 Very nice condition with some slight surface scratching. Will
Platinum
Tiffany & Co. Jazz Diamond Platinum PT950 Drop Earrings
By Tiffany & Co.
Located in Simpsonville, SC
The Tiffany & Co. Jazz Diamond Platinum PT950 Drop Earrings are a breathtaking embodiment of
Diamond, Platinum
Tiffany & Co. Jazz Diamond Platinum PT950 Drop Earrings
By Tiffany & Co.
Located in Simpsonville, SC
The Tiffany & Co. Jazz Diamond Platinum PT950 Drop Earrings are a breathtaking embodiment of
Diamond, Platinum
Tiffany & Co. Jean Schlumberger 16 Stone Diamond Band 18K Gold PT 950 Size 4.5
By Jean Schlumberger for Tiffany & Co.
Located in Fairfield, CT
Tiffany & Co. Jean Schlumberger 16 Stone Diamond Band 18K Gold PT 950 Size 4.5 This band ring
Diamond, Gold, 18k Gold, Yellow Gold, Platinum
Harry Winston 0.80 ct Heart shape Diamond Solitaire Ring Pt 950 US 5.75
By Harry Winston
Located in Kobe, Hyogo
0.80ct ) Color: D Clarity:VS1 Polish: Very Good Symmetry: Very Good Fluorescence: None Metal: Platinum
Diamond, Platinum
Tiffany & Co. Jean Schlumberger 16 Stone Diamond Band 18K Gold PT 950 Size 7
By Jean Schlumberger for Tiffany & Co.
Located in Fairfield, CT
Tiffany & Co. Jean Schlumberger 16 Stone Diamond Band 18K Gold PT 950 Size 7 This exceptional ring
Diamond, Gold, 18k Gold, Yellow Gold, Platinum
Tiffany & Co. Elsa Peretti Platinum PT950 Open Heart Stud Earrings
By Tiffany & Co.
Located in Simpsonville, SC
The Tiffany & Co. Platinum Heart Stud Earrings are a refined expression of elegance and simplicity
Platinum
Cartier 1895 Wedding Band Diamond Ring 49 PT950
By Cartier
Located in Kobe, Hyogo
Item: Cartier 1895 Wedding Band Diamond Ring Stones: Diamond (0.01ct) Metal: Platinum 950 Ring Size
Diamond, Platinum
Tiffany Harmony 0.20 ct Solitaire Diamond Ring PT950
By Tiffany & Co.
Located in Kobe, Hyogo
Polish: Excellent Symmetry: Excellent Fluorescence: None Metal: Platinum 950 Ring Size: US SIZE 5.75-6.0
Diamond, Platinum
Tiffany Harmony 0.32 ct Solitaire Diamond Ring PT950
By Tiffany & Co.
Located in Kobe, Hyogo
: Excellent Symmetry: Excellent Fluorescence: None Metal: Platinum 950 Ring Size: US SIZE 5.5 UK SIZE K 1/4
Diamond, Platinum
Tiffany Harmony 0.24 ct Solitaire Diamond Ring PT950
By Tiffany & Co.
Located in Kobe, Hyogo
: Excellent Symmetry: Excellent Fluorescence: Medium Blue Metal: Platinum 950 Ring Size: US SIZE 5.75 UK SIZE
Diamond, Platinum
Mikimoto 8.4 mm Akoya Pearl & Diamond Ring Pt950
By Mikimoto
Located in Kobe, Hyogo
Item: Mikimoto Akoya Pearl Ring Stones: 8.4 mm Akoya Pearl / Diamonds Metal: Platinum 950 Ring Size
Diamond, Pearl, Platinum
Tiffany Harmony 0.34 ct Solitaire Diamond Ring PT950
By Tiffany & Co.
Located in Kobe, Hyogo
: Excellent Symmetry: Excellent Fluorescence: None Metal: Platinum 950 Ring Size: US SIZE 5.75 UK SIZE K 3/4
Diamond, Platinum
Tiffany Harmony 0.25 ct Solitaire Diamond Ring PT950
By Tiffany & Co.
Located in Kobe, Hyogo
: Excellent Symmetry: Excellent Fluorescence: None Metal: Platinum 950 Ring Size: US SIZE 5.25 - 5.5 UK SIZE K
Diamond, Platinum
Tiffany Harmony 0.23ct Solitaire Diamond Ring PT950 with 18 Pave Diamonds
By Tiffany & Co.
Located in Kobe, Hyogo
: Platinum 950 Ring Size: SIZE 5.75 UK SIZE K 3/4 Internal Diameter: 16.25 mm Measurements: 1.7 - 3.9 mm
Diamond, Platinum
Tiffany Harmony 0.31 ct Solitaire Diamond Ring PT950 US 6.25 - 6.5
By Tiffany & Co.
Located in Kobe, Hyogo
: Excellent Symmetry: Excellent Fluorescence: Faint Metal: Platinum 950 Ring Size: US SIZE 6.25 - 6.5 UK SIZE
Diamond, Platinum
Orloff of Denmark - PT950 - Heated Royal Blue Ceylon Sapphire Diamond Ring
Located in Hua Hin, TH
VS1 diamonds (0.67 ct total, F color) in a double halo arrangement, set in solid 950 platinum for a
Diamond, Sapphire, Blue Sapphire, Platinum
Tiffany Harmony 0.20 Carat Solitaire Diamond Ring PT950 with 18 Pave Diamonds
By Tiffany & Co.
Located in Kobe, Hyogo
Fluorescence: None Metal: Platinum 950 Ring Size: SIZE 4.75 - 5.0 UK SIZE J Internal Diameter: 15.65 mm
Diamond, Platinum
Tiffany Harmony 0.23 Carat Solitaire Diamond Ring PT950 with 18 Pave Diamonds
By Tiffany & Co.
Located in Kobe, Hyogo
Fluorescence: None Metal: Platinum 950 Ring Size: SIZE 5.0 UK SIZE J 1/4 Internal Diameter: 15.70 mm
Diamond, Platinum
Hammerman Brothers Nephrite And Diamond Turtle 18k Gold PT950 Pendant
By Hammerman Brothers
Located in Beverly Hills, CA
Hammerman Brothers Nephrite and Diamond Turtle 18k Yellow Gold & Platinum PT950 Pendant Brooch
Diamond, 18k Gold
Sold|$2,600
Platinum Huggie Earrings
Located in Litchfield, CT
, .20 carats total weight G color, VS clarity diamonds. HALLMARKS: Maker's mark and 950 Pt for
White Diamond, Emerald, Blue Sapphire, Platinum
Sold|$1,975
Cartier Platinum Love Band
By Cartier
Located in New York, NY
Cartier Classic! Platinum Cartier PT 950 50 QJ Cartier Hallmark: # 7215 Size: 5.5 Width is
Platinum
Sold|$3,995
Aquamarine Diamond Halo Platinum Ring
Located in Stamford, CT
Tested: Platinum Stamped: PT 950 Hallmark: MWI7 8.6 grams Width at top: 13.3mm Height at top: 9.5mm
Aquamarine, Diamond, Platinum
Sold|$3,800
Cartier Diamond Platinum Engagement Ring
By Cartier
Located in Litchfield, CT
color and VS2 clarity diamond HALLMARKS: Cartier, Pt 950 for 950 fineness platinum, 52 for French
White Diamond, Platinum
Tiffany & Co. Platinum Wedding Band Ring 8.91g
By Tiffany & Co.
Located in SYDNEY, NSW
minimal signs of wear. Band width approximately 4.5mm Metal: Platinum PT950 Carat: N/A Colour: N/A
Platinum
Stunning Platinum & Diamond 3.0 Ct Cross Pendant on Tiffany & Co. Platinum Chain
By Tiffany & Co.
Located in GB
totalling 3.0 cts. The chain is fully hallmarked Tiffany & Co on one side of the clasp and PT 950 on the
Diamond, Platinum
Sold|$3,950
Platinum Diamond Engagement Ring
Located in Towson, MD
One estate platinum (stamped PT950) diamond engagement ring set with one 0.77 carat emerald cut
Diamond, Platinum
Sold|$5,500
Cartier Diamond Platinum Eternity Band
By Cartier
Located in New York, NY
, signed Cartier, Pt950, 666140, 52, french platinum hallmark
Diamond, Platinum
Sold|$3,995
Diamond Platinum Bow Dangle Earrings
Located in Stamford, CT
Width: 1 1/2 inches or 9mm 9.5 grams Posts stamped Pt 950 Earrings tested: Platinum Earring
Diamond, Platinum
Tiffany & Co. Sevillana Diamond Platinum Pendant Necklace
By Tiffany & Co.
Located in Stamford, CT
. 55 round full cut diamonds, approx. total weight .50cts, F, VS1 950 Platinum Tested: 950 Platinum
Diamond, Platinum
Platinum Sapphire Diamond Ring Vintage Jewelry
Located in Beverly Hills, CA
four-prong platinum (Pt950) setting. The band is gracefully adorned with a row of round brilliant-cut
Diamond, Sapphire, Platinum
Sold|$6,820
Aqua Diamond Platinum Dangle Earrings
Located in Stamford, CT
11.7 grams Tested: Platinum Stamped: PT 950 Top to bottom: 37.08mm or 1.46 inches Width
Aquamarine, Diamond, Platinum
Sold|$3,880
Aquamarine Diamond Platinum Dangle Earrings
Located in Stamford, CT
. total weight .36cts, H, VS Platinum Stamped: PT 950 Tested: Platinum 9.4 grams Top to bottom
Aquamarine, Diamond, Platinum
Round Synthetic Ruby Diamond Platinum Earrings
Located in Stamford, CT
.008ct 32 synthetic bright red Rubies, approx. total weight 2.40cts, VS 950 Platinum Tested: Platinum
Diamond, Ruby, Platinum
Tiffany & Co. Triple Dangle Diamond Platinum Earrings
By Tiffany & Co.
Located in Stamford, CT
Thickness: 2.13mm 5.2 Grams Stamped: Pt 950 Tested: Platinum Hallmark: Tiffany & Co
Diamond, Platinum
Tiffany & Co. Platinum Stacking Band Ring
By Tiffany & Co.
Located in Philadelphia, PA
Platinum band with rounded curvature and polished finish Fully Signed Tiffany & Co. Stamped PT950
Platinum
Tiffany & Co. Platinum Stacking Band Ring
By Tiffany & Co.
Located in Philadelphia, PA
Platinum band with rounded curvature and polished finish Fully Signed Tiffany & Co. Stamped PT950
Platinum
Tiffany & Co. Platinum Stacking Band Ring
By Tiffany & Co.
Located in Philadelphia, PA
Platinum band with rounded curvature and polished finish Fully Signed Tiffany & Co. Stamped PT950
Platinum
Sold|$7,345
Cushion Halo Diamond Platinum Infinity Ring
Located in Stamford, CT
, approx. total weight .60cts, H-I, SI2 - I1, IGI certificate #33557015 10.3 grams Stamped: PT 950
Diamond, Platinum
Tiffany & Co. Platinum Diamond Circlet Necklace
By Tiffany & Co.
Located in San Fernando, CA
Tiffany & Co. Platinum (PT950) Circlet Collection Necklace Lariat style Pendant Circlet connecting
Diamond, Platinum
Sold|$3,500
Art Deco Natural Jade Platinum Pin
Located in Litchfield, CT
inch by 1 1/8 inch WEIGHT: 12.0 grams STONES: Natural Jadeite Jade HALLMARKS: Platinum, PT
Jade, Platinum
Sold|$3,900
Sidney Garber Diamond Earrings Platinum
Located in Litchfield, CT
STONES: 1.80 carats total weight of G color, VS clarity diamonds HALLMARKS: Garber, 18k, PT 950 for
Diamond, 18k Gold, White Gold, Platinum
Sold|$29,995
Tiffany & Co. Diamond Platinum Bubbles Necklace
By Tiffany & Co.
Located in Stamford, CT
weight 8.40 cts Platinum Stamped: Pt950 Tested: Platinum Hallmark: c 2002 Tiffany & Co 78.0 Grams
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.