Hammerman Brothers 14.22Ct. Diamond, & 56.63Ct. Kunzite, Art Deco Style Pendant
By Hammerman Brothers
Located in New York, NY
necklace is 24". Kunzite = 53.63 carats Diamonds 94 = 14.22 carats Stamped Hammerman PT 950 94 diamonds
Diamond, Kunzite, Platinum
3.75 Carat Pear Shaped Diamond Platinum Dangle Drop Earrings
Located in Stamford, CT
– H, SI1 – SI2, EGL certified# US311639501J Platinum 950 Tested: Platinum Stamped: PT 950 8.1 grams
Diamond, Platinum
8.25 Carat Green Tourmaline White Yellow Diamond Art Deco Platinum Earrings
Located in Stamford, CT
cut diamond, approx. total weight .12cts Top to bottom: 21mm Stamped: Pt 950 Width: 9mm Depth: 8mm
Diamond, Yellow Diamond, Tourmaline, Platinum
Tiffany Diamond Ladybug Charm Pendant
Located in London, GB
, Clarity: VS Marked: ‘T & Co’ ‘PT 950’ Hallmarked: Yes (Platinum, London, 2008) Box: Plain gift box
Diamond, Platinum
Edwardian 950 Platinum ~2 Carat Central Diamond Emerald Engagement Ring
Located in Vilnius, Vilniaus apskr.
(central ~2ct) and step cut emeralds. Circa 1900. Signed with “PT 950” Weight: 3.63g Size: 16.25 (US
Diamond, Emerald, Platinum
Tiffany & Co. Platinum Diamond Eternity Band Ring Size 9.75 #24260
By Tiffany & Co.
Located in Washington Depot, CT
. Diamond color: G Diamond clarity: VS Weight: 4.9 g./ 2.9 dwt. Hallmark: TIFFANY&CO. PT 950 Ring
Diamond, Platinum
Diamond Emerald Platinum Wedding Anniversary Stacking Band Ring
Located in Boca Raton, FL
stamped PT 950. A luxurious, eye-catching piece with elegant symmetry and timeless gemstone contrast
Diamond, Emerald, Platinum
French GIA Certified No Oil Colombian Emerald Platinum Diamond Brooch
Located in New York, NY
” Hallmarks: French Maker’s Mark, Axe Mark, Pt 950, Dog Head mark and Serial Number
Diamond, Emerald, Platinum
$4,000
W 0.54 in L 0.65 in
Tiffany & Co. Elsa Peretti Cross Pendant Necklace with Diamonds in Platinum
By Elsa Peretti for Tiffany & Co.
Located in Scottsdale, AZ
: Tiffany & Co. PT 950 Peretti Estate Condition: Very good, professionally cleaned and polished
Diamond, Platinum
Tiffany & Co. Embrace Semi-Eternity 9 Round Diamond Band Ring in Platinum
By Tiffany & Co.
Located in Scottsdale, AZ
Outer diameter: 18.45 mm Stamped: Tiffany & Co. PT 950 Estate Condition: Excellent, professionally
Diamond, Platinum
82.82 Carat Sapphire Diamond Pearl Belle Époque Platinum Dangle Earrings
Located in Stamford, CT
: 13.46mm or .53 inch 21.7 grams Tested: Platinum Stamped: PT 950
Diamond, Natural Pearl, Sapphire, Pearl, Blue Sapphire, Platinum
Tiffany & Co. Platinum Paper Flower Ring Tanzanite Diamonds
By Tiffany & Co.
Located in Beverly Hills, CA
" x 9/16" RING SIZE: 6 - 6.25 HALLMARKS: Tiffany & Co., PT 950
Diamond, Tanzanite, Platinum
Tiffany & Co. Platinum Band Ring
By Tiffany & Co.
Located in Philadelphia, PA
central band. Marked Tiffany & Co. / 950 PT to the interior of the band. Simply wonderful design from
Platinum
Platinum Emerald Cut Diamond Double Halo Engagement Ring Size 7 #19747
Located in Washington Depot, CT
approximated and calculated by formula. Ring Size: 7 Weight: 4.3 dwt/ 6.8 gr Stamped: PT 950 JLJ .70 ct
Diamond, Platinum
Tiffany & Co. Victoria Marquise Diamond Large Model Pendant Necklace in Platinum
By Tiffany & Co.
Located in Scottsdale, AZ
length, providing a perfect fit for most necklines. The Tiffany & Co. PT 950 stamp confirms the
Diamond, Platinum
GIA Certified Platinum Tiffany & Co. Diamond Solitaire Ring 1.03 ct
By Tiffany & Co.
Located in Laguna Beach, CA
stamped Tiffany & Co Pt 950, 1.03, D24101. The gross ring weight is 2.4 grams. The 1.03-carat round
Diamond, Platinum
Cartier 1895 4 Ct. Cushion Cut Diamond Solitaire Pave Engagement Ring
By Cartier
Located in Chicago, IL
clarity. The ring is stamped "©Cartier Pt 950" & "49CS 3.51ct D 53P***". The ring comes with GIA
Diamond, Platinum
Jockey Horse Racer Diamonds Platinum Enamel Unisex Brooch Boxed, 1975
Located in Herzelia, Tel Aviv
. Well, worth a fine jewelry collection. Stamped: PT 950 (Platinum) Weight: 0.30 oz (8.55 gr) Length
Diamond, Platinum, Enamel
Hammerman Brothers Plat. Art Deco Style Aquamarine 20.62 Carat 10.55Ct. Pendant
By Hammerman Brothers
Located in New York, NY
Round Diamonds = 5.34 carats Stamped HB Hammerman PT 950
Aquamarine, Diamond, Platinum
Vintage Van Cleef & Arpels Natural Diamond Platinum Band Etoile Ring 5.25 EU50
By Van Cleef & Arpels
Located in Birmingham, GB
colour VVS clarity. The ring is signed VCA PT 950 with serial numbers .Band is 2.6mm thick. Ring size
Diamond, White Diamond, Platinum
Tiffany & Co. Channel Set Semi Eternity Diamond Wedding Band Ring Platinum
By Tiffany & Co.
Located in Scottsdale, AZ
outer diameter: 18.67 mm Band Width: 2.3 mm Stamped: Tiffany & Co. PT 950 Estate Condition
Diamond, Platinum
Tiffany & Co. Channel Set Semi Eternity Diamond Band Ring in Platinum, Size 3.75
By Tiffany & Co.
Located in Scottsdale, AZ
Ring outer diameter: 18.16 mm Band Width: 2.0 mm Stamped: Tiffany & Co. PT 950 Estate Condition
Diamond, Platinum
Cartier 1895 Solitaire Brilliant-Cut Diamond Engagement Ring Platinum 1.12Carats
By Cartier
Located in Honolulu, HI
box as well as the Cartier purchase receipt and printed GIA report. The ring is stamped "Pt 950" "55
Diamond, Platinum
Vintage Tiffany & Co. Platinum Wedding Band Ring
By Tiffany & Co.
Located in Philadelphia, PA
, central band flanked by two narrow, ribbed outer bands. Marked Tiffany & Co. / 950 PT to the interior of
Platinum
$1,344Sale Price|20% Off
Tiffany & Co. 0.31 Carat H VVS1 Diamond Engagement Ring
By Tiffany & Co.
Located in Sewickley, PA
forged in premium platinum, marked “Tiffany & Co. PT 950,” ensuring both durability and luxurious luster
Diamond, Platinum
Tiffany & Co Platinum Sapphire Diamond Tie Clip Signed Boxed, 1970
Located in Herzelia, Tel Aviv
modern chic outfit. The item is stamped with PT 950 Platinum hallmark and signed Tiffany & Co. A true
Diamond, Sapphire, Platinum
Tiffany & Co. Classic Milgrain Wedding Band Ring in Platinum
By Tiffany & Co.
Located in Honolulu, HI
stamped "PT 950" on the inside. This is a pre-owned Tiffany band in excellent condition. The band is size
Platinum
Bvlgari 4.59cts Emerald Diamond Platinum Estate Pinky Bulgari Cocktail Ring
By Bulgari
Located in Miami, FL
height. Ring size 4.5 in USA ring size. Excellent Condition. Hallmarked: "Bvlgari", PT 950 It comes
Diamond, Emerald, Platinum
Tiffany and Co. Platinum Classic Milgrain Wedding Band Ring
By Tiffany & Co.
Located in New York, NY
Grams Measurements: 6mm Size: 11.75 Hallmark: Tiffany & Co., PT, 950 Item #: BR-1832-031426-09
Platinum
Tiffany & Co. Diamond and Emerald Scottie Dog Charm Pendant
Located in London, GB
Details: Colour: E-F, Clarity: VVS Emeralds: Approx. 0.03 carats Marked: ‘T & Co’ ‘PT 950’ Hallmarked
Diamond, Platinum
Vintage Platinum 2.91tcw G-H Vs1 Princess Cut Diamond Ring GIA
Located in New York, NY
Diamond G-H Vs1 Measurements: 26.3 x 21.55 x 8.05mm Size: 6.5 Hallmark: Pt 950 Item #: BR-1760-112425-17
Diamond, Platinum
IGI Certified Irina Ferry 7.29 CT Violet Spinel Diamond Platinum Ring
Located in Westport, CT
approximately 0.28 CT in total, approximately near colorless and SI1–SI2 clarity. Stamped “Irina Ferry PT 950
Diamond, Spinel, Platinum
$45,600Sale Price|20% Off
Tiffany & Co. 2.03 Carat True Radiant Brilliant Diamond Engagement Ring
By Tiffany & Co.
Located in Chicago, IL
inscription "GIA 223558***"*. The inner band is stamped "©TIFFANY & CO. PT 950" and "7159** D2.03ct
Diamond, White Diamond, Platinum
Vintage Van Cleef & Arpels NY Natural Diamond Platinum Solitaire Band Ring 49
By Van Cleef & Arpels
Located in Birmingham, GB
exception. F/G colour VVS clarity with an excellent round brilliant cut. The ring is signed VCA PT 950 with
Diamond, White Diamond, Platinum
Tiffany & Co .98 Carat Diamond Platinum Bubble Key Pendant
By Tiffany & Co.
Located in Stamford, CT
, F VS approx. .98cts Platinum Stamped: PT 950 Italy Hallmark: Tiffany + Co 10.1 grams Top to bottom
Diamond, Platinum
Tiffany & Co .50 Carat Round Diamond Platinum Key Pendant
By Tiffany & Co.
Located in Stamford, CT
optimism. 107 brilliant cut diamonds, F-G VS approx. .50cts Platinum Stamped: PT 950 Hallmark: Tiffany
Diamond, Platinum
GIA Certified 1.03 Carat Diamond Platinum Engagement Ring by Tiffany & Co.
By Tiffany & Co.
Located in Beverly Hills, CA
.,” “Lucida,” “PT 950,” and additional patent and serial numbers, this ring is a size 4.5 and weighs 4.1 grams
Diamond, Platinum
$28,000
W 0.79 in D 0.47 in L 0.73 in
Tiffany & Co Elsa Peretti 2.85 Carat Sapphire Platinum Bean Cufflinks
By Elsa Peretti for Tiffany & Co.
Located in Stamford, CT
, approx. 2.85cts Platinum Stamped: PT 950 Hallmark: TIffany + Co Elsa Peretti 28.4 grams Top to bottom
Sapphire, Platinum
Tiffany & Co. 18k Gold & Platinum Accent Diamond Band Ring
By Tiffany & Co.
Located in Beverly Hills, CA
" RING SIZE: 5.5 HALLMARKS: TIFFANY & CO., 750, PT 950
Diamond, Platinum, 18k Gold
15.00 Carat Geometric Kunzite Diamond Platinum Art Deco Pendant Necklace
Located in Stamford, CT
diamonds, H VS approx. .20cts 1 marquise shape diamond, H VS approx. .12cts Platinum Stamped: PT 950 14.2
Diamond, Kunzite, Platinum
Peter Suchy 1.36 Oval Sapphire Diamond Three-Stone Platinum Engagement Ring
By Peter Suchy
Located in Stamford, CT
pear cut diamonds H-I VS-SI approximate .36 carats Size 7 and sizable Platinum 7.6 Grams Stamped: PT
Diamond, Sapphire, Blue Sapphire, Platinum
Tiffany & Co. 1.75 Carat Diamond Platinum Rose Gold Lock Pendant Necklace
By Tiffany & Co.
Located in Stamford, CT
brilliant cut diamonds, approx. 1.75cts Platinum 18k rose gold Stamped: PT 950 750 Hallmark: Tiffany + Co
Diamond, Gold, 18k Gold, Rose Gold, Platinum
Diamond and Platinum Double Halo Cluster Engagement Ring
Located in London, GB
UK finger size 'R', but could be altered by a few sizes. Stamped PT 950. Tobi Gem Setting has
Diamond, White Diamond, Platinum
Tiffany & Co. Vannerie Platinum Diamond Eternity Band
By Tiffany & Co.
Located in Venice, CA
8.75 grams. It is marked with the Tiffany & Co. plaque, as well as PT 950 and the copyright. The
Diamond, Platinum
Peter Suchy .58 Carat Oval Diamond Halo Platinum Slide Pendant Necklace
By Peter Suchy
Located in Stamford, CT
, VS1.58 12 round diamonds, approx. total weight .09cts, F, VS 950 Platinum Tested: Platinum Stamped: PT
Diamond, Platinum
Peter Suchy .53 Carat Round Diamond Platinum Halo Pendant Necklace
By Peter Suchy
Located in Stamford, CT
.39 inch Width: 9.84mm or .38 inch Depth: 3.33mm 2.8 grams Tested: Platinum Stamped: PT 950 Length: 18
Diamond, Platinum
Shreve, Crump & Low GIA Certified 5.13 Carat J VS2 Emerald Cut Diamond Plat Ring
By Shreve, Crump & Low
Located in Boston, MA
6.5, stamped with our maker hallmark "SC&L" "PT 950" Shreve, Crump & Low is one of America's oldest
Diamond, Platinum
$4,850 / set
W 0.21 in L 0.21 in
Tiffany & Co. Victoria Mini Marquise Diamond Stud Earrings in Platinum with Box
By Tiffany & Co.
Located in Scottsdale, AZ
Gemstones: Diamonds Closure Type: La Pousette Stamped: Tiffany & Co., PT 950 Dimensions: 5.2mm x 5.2mm
Diamond, Platinum
Cartier Signet Ring Initial Vintage Platinum Sz 6.75 Square Heavy Band Jewelry
By Cartier
Located in Torrance, CA
& Hallmark: 950 platinum. The ring is hallmarked "PT 950", "Cartier" along with the serial number. The outer
Platinum
Estate Platinum Diamond Engagement Ring 1.03ct
Located in Narberth, PA
smooth and simple, and the inside of the shank is marked with a "PT 950" purity mark and a small
Diamond, Yellow Diamond, Platinum
Platinum PT950 Emerald And Diamond Ring
Located in Sydney, NSW
/ 7 US Item weight: 7.12g Hallmarks: PT 950 Era: Contemporary Condition: Excellent - New. All
Diamond, Emerald, Platinum
Kurt Wayne 3.50 Carat Diamond Platinum Swirl Hoop Earrings
By Kurt Wayne
Located in Stamford, CT
cut diamonds, approx. total weight 3.50cts, E – F, VS1 – VS2 Tested: Platinum Stamped: PT 950 Hallmark
Diamond, Platinum
Tiffany & Co. Atlas 1.00 Carat Diamond Gold Platinum Necklace
By Tiffany & Co.
Located in Stamford, CT
Length: 16 inches 18k yellow gold Platinum 75.8 Grams Tested: 18k Stamped: PT 950 750 Hallmark: C1995
Diamond, 18k Gold, Yellow Gold, Platinum, Gold
Peter Suchy .64 Carat Pear Diamond Halo Platinum Slide Pendant Necklace
By Peter Suchy
Located in Stamford, CT
diamonds, approx. total weight .14cts, F, VS 950 Platinum Tested: Platinum Stamped: PT 950 Hallmark: Made
Diamond, Platinum
5.05 Carat Round Blue Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
weight .76cts, F – G, VS Size 6.75 and sizable 950 Platinum Tested: Platinum Stamped: PT 950 Hallmark
Diamond, Blue Sapphire, Sapphire, Platinum
Cartier 0.30ct Diamond Engagement Ring Platinum Sz 5 Estate COA GIA Signed
By Cartier
Located in Torrance, CA
inches), rising 5mm from the finger. Metal & Hallmark: Platinum. The ring is hallmarked "Pt 950" for
Diamond, White Diamond, Platinum
Tiffany & Co. GIA Certified Engagement Ring in Platinum with 0.45cts Diamond
By Tiffany & Co.
Located in Miami, FL
, the serial numbers and signed, "©TIFFANY & CO. 27930018 0.45 CT PT .950". Collateral: It is
Diamond, White 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.