Platinum GIA 4.05ct Royal Blue Long Oval Sapphire w/ Diamond Accents Ring
Located in Montclair, NJ
Comes w/ the original GIA certification for the sapphire. Stock Number: MK-360231015 --Certification Details:-- Laboratory: GIA Report Number: 1539210897 Shape: Oval Cutting Style:...
Diamond, Sapphire, Platinum
Platinum 3.52ctw GIA Bright Red Burma Ruby Diamond Halo Sapphire Shoulders Ring
Located in Montclair, NJ
Comes with original GIA certification for the ruby. Stock Number: MK-630176091 --Certification Details:-- Laboratory: GIA Report Number: 2235694673 Stone Shape: Oval Cutting Style: ...
Diamond, Ruby, Sapphire, Platinum
New Platinum GIA 1.14ct Oval Pink Sapphire Diamond Band Sideway East West Ring
Located in Montclair, NJ
Comes w/ original GIA certification for the sapphire stone. Stock Number: MK-39052500 --Certification Details:-- Laboratory: GIA Report Number: 6237712251 Shape: Oval Cutting Style:...
Diamond, Pink Sapphire, Platinum
New Platinum GIA 1.14ctw Pink Sapphire Diamond Shoulders Engagement Promise Ring
Located in Montclair, NJ
Comes w/ original GIA certification for the sapphire stone. Stock Number: MK-71053156 --Certification Details:-- Laboratory: GIA Report Number: 2233712242 Shape: Oval Cutting Style:...
Diamond, Pink Sapphire, Platinum
New Platinum GIA 1.14ctw Oval Pink Sapphire Diamond Engagement Wedding Ring
Located in Montclair, NJ
Comes w/ original GIA certification for the sapphire stone. Stock Number: MK-17053005 --Certification Details:-- Laboratory: GIA Report Number: 2235712703 Shape: Oval Cutting Style:...
Diamond, Pink Sapphire, Platinum
Platinum GIA 5.57ct High Quality Rich Green Burma A Jade w/ Diamond Accents Ring
Located in Montclair, NJ
(top of the ring - north to south) - 18.4mm (0.72") (east to west - round diamond to round diamond), 2.5mm (bottom of the shank) Height: 7.8mm (rises off the finger) Stamp: PT900 - 5...
Diamond, Jade, Platinum
Antique Edwardian Platinum GIA 2.09ctw Old Diamond Buckle Sides Engagement Ring
Located in Montclair, NJ
Comes with the original GIA certification for the center diamond. Stock Number: MK-340216840-PAR --Certification Details:-- Laboratory: GIA Report Number: 6233556178 Shape: Old Euro...
Diamond, Platinum
Platinum GIA 7.05ct Oval Cut Aquamarine Solitaire Floral Basket Solitaire Ring
Located in Montclair, NJ
GIA Accidentally misread the 5 in 7.05 as an 8 and put 7.08 on the certification. Actual weight is 7.05ct. Stock Number: MK-94076085 --Certification Details:-- Laboratory: GIA Repo...
Aquamarine, Platinum
Gump's 18k Yellow Gold GIA Large Dark Nephrite Jade Solitaire Heavy Ring
By Gump's San Francisco
Located in Montclair, NJ
Stock Number: MK-130230160 --Certification Details:-- Laboratory: GIA Report Number: 2231649764 Shape: Oval Cutting Style: Double Cabochon Transparency: Opaque Color: Very Dark Gree...
Jade, Gold, 18k Gold, Yellow Gold
New Platinum GIA Vivid Oval Pink Sapphire w/ Diamond Band Dainty Stackable Ring
Located in Montclair, NJ
Comes w/ original GIA certification for the sapphire stone. Stock Number: MK-50052509 --Certification Details:-- Laboratory: GIA Report Number: 2235712291 Shape: Oval Cutting Style:...
Diamond, Pink Sapphire, Platinum
14k Gold GIA 1.2ct Alternating Brazil Alexandrite Diamond Low Profile Band Ring
Located in Montclair, NJ
Ring Width: 3.5mm (0.13") (top of the ring - north to south), 21.6mm (0.85")(east to west, alexandrite to alexandrite) - 2.4mm (bottom of the shank) Ring Height: 3.2mm rise off the f...
Chrysoberyl, Diamond, Gold, 14k Gold, White Gold
Vintage Platinum 1.24ct GIA Round Step Sapphire w/ Baguette Diamond Sides Ring
Located in Montclair, NJ
Comes w/ the original GIA certification for the sapphire. Stock Number: MK-19049491 --Certification Details:-- Laboratory: GIA Report Number: 2235694636 Shape: Round Cutting Style:...
Diamond, Sapphire, Platinum
Antique Victorian Gold GIA Buttercup Ruby Solitaire w/ Enamel Detailed Ring
Located in Montclair, NJ
Comes with original GIA certification for the ruby. Stock Number: MK-46053517 --Certification Details:-- Laboratory: GIA Report Number: 5232663315 Stone Shape: Cushion Cutting Style...
Ruby, Gold, 18k Gold, Yellow Gold, Enamel
Heavy Platinum GIA 9.03ct Long Rectangular Vivid Green Tourmaline & Diamond Ring
Located in Montclair, NJ
Comes with the original GIA certification for the tourmaline. Stock Number: MK-650148599 --Certification Details:-- Laboratory: GIA Report Number: 5231634158 Shape: Rectangular Cutt...
Diamond, Tourmaline, Platinum
Platinum GIA 7.87ctw Fantasy Cut Blue Green Tourmaline Pave Diamond Sides Ring
Located in Montclair, NJ
Comes with the original GIA certification for the tourmaline. Stock Number: MK-130121971 --Certification Details:-- Laboratory: GIA Report Number: 2235634177 Shape: Modified Rectang...
Diamond, Tourmaline, Platinum
Antique Gold & Platinum GIA South Sea Pearl 0.80ctw Old Euro Diamond Mosaic Ring
Located in Montclair, NJ
Comes w/ original GIA certification for the pearl. Stock Number: MK-390184969 --Certification Details:-- Laboratory: GIA Report Number: 5231652128 Identification: Bead Cultured Pear...
Diamond, Pearl, Gold, Yellow Gold, Platinum
Platinum GIA 6.83ctw No Heat Deep Blue Sapphire & Diamond Pendant Chain Necklace
Located in Montclair, NJ
Comes with the original GIA certification for the sapphire. Stock Number: MK-360343590 --GIA Certification:-- Laboratory: GIA Report Type: Sapphire Report GIA Report Number: 5232663...
Diamond, Sapphire, Platinum
18k White Gold GIA 1.77ctw Oval Cut Vivid Red Ruby w/ Diamond Halo Ring
Located in Montclair, NJ
Comes with original GIA certification for the ruby. Stock Number: MK-13097517 --Certification Details:-- Laboratory: GIA Report Number: 5232667890 Stone Shape: Oval Cutting Style: C...
Diamond, Ruby, Gold, 18k Gold, White Gold
Vintage Large GIA 17.76ct Oval Cabochon Emerald & Diamond Slide Pendant Necklace
Located in Montclair, NJ
Comes with original GIA certification for the emerald. Stock Number: MK-360397501 --Certification Details:-- Laboratory: GIA Report Number: 2235663368 Shape: Oval Cutting Style: Dou...
Diamond, Emerald, Platinum
Platinum GIA 2.37ct Oval No Heat Ceylon Sapphire Round & Baguette Diamond Ring
Located in Montclair, NJ
Comes w/ the original GIA certification for the sapphire. Stock Number: MK-360118594 --Certification Details:-- Laboratory: GIA Report Number: 5232732121 Shape: Oval Cutting Style:...
Diamond, Sapphire, Platinum
Vintage Platinum GIA 1.26ctw Gray Opal w/ Diamond Sides Low Profile Band Ring
Located in Montclair, NJ
Excellent overall condition! Comes w/ GIA certification for the opal! Stock Number: MK-140148010 --Certification Details:-- Laboratory: GIA Report Number: 2231686432 Shape: Oval Cut...
Diamond, Opal, Platinum
Platinum GIA 3.87ctw Long Top Color No Oil Emerald Diamond Ballerina Ring
Located in Montclair, NJ
Comes w/ original GIA certification for the emerald. Stock Number: MK-150228955 --Certification Details:-- Laboratory: GIA Report Number: 2235694688 Shape: Octagonal Cutting Style:...
Diamond, Emerald, Platinum
Platinum GIA 4.83ctw Happy Green Burma A Jade w/ Diamond Halo Ballerina Ring
Located in Montclair, NJ
(top of the ring - north to south) - 17.5mm (0.69") (east to west - diamond to diamond), 2.6mm (bottom of the shank) Height: 11mm (rises off the finger) Stamp: PT900 - 0.60 Condition...
Diamond, Jade, Platinum
18k Gold & Silver Top GIA 1.53ct Emerald Cut Collet Set Ruby Solitaire Low Ring
Located in Montclair, NJ
Comes with original GIA certification for the ruby. Stock Number: MK-160120750 --Certification Details:-- Laboratory: GIA Report Number: 6237569931 Stone Shape: Octagonal Cutting St...
Ruby, Gold, 18k Gold, Yellow Gold, Silver
Platinum GIA 1.06ct Round Purple Spinel & Diamond Wide Open Lattice Band Ring
Located in Montclair, NJ
Comes with the original GIA certification for the spinel. Stock Number: MK-71075396 --Certification Details:-- Laboratory: GIA Report Number: 2235667811 Shape: Round Cutting Style: ...
Diamond, Spinel, Platinum
18k Yellow Gold GIA 2.55ctw Pear No Heat Red Ruby Diamond Wide Band Ring
Located in Montclair, NJ
Comes with original GIA certification for the ruby. Stock Number: MK-460188599 --Certification Details:-- Laboratory: GIA Report Number: 5232637450 Stone Shape: Pear Cutting Style: ...
Diamond, Ruby, Gold, 18k Gold, Yellow Gold
Platinum GIA 8.12ctw Burma A Apple Green Jade w/ Diamond Halo Statement Ring
Located in Montclair, NJ
Stock Number: MK-190160360 --Certification Details:-- Laboratory: GIA Report Number: 5231686823 Shape: Oval Cut: Cabochon Transparency: Translucent Color: Green Species: Jadeite Jad...
Diamond, Jade, Platinum
Platinum GIA 2.53ctw Oval Ruby w/ Baguette & Round Diamond Flared Ballerina Ring
Located in Montclair, NJ
Comes with original GIA certification for the ruby. Stock Number: MK-120128596 --Certification Details:-- Laboratory: GIA Report Number: 2235650260 Stone Shape: Oval Cutting Style: ...
Diamond, Ruby, Platinum
High Quality Platinum 3.20ctw GIA Ruby & Diamond Long Ballerina Dinner Ring
Located in Montclair, NJ
Comes with original GIA certification for the Ruby stone. Stock Number: JO-200207513 --Certification Details:-- Laboratory: GIA Report Number: 6233685254 Shape: Oval Cutting Style C...
Diamond, Ruby, Platinum
Antique Edwardian French 18k Gold w/ Platinum GIA 3.40ct Sapphire & Diamond Ring
Located in Montclair, NJ
Comes w/ the original GIA certification for the center sapphire. Stock Number: MK-390401313 --Certification Details:-- Laboratory: GIA Report Number: 5221523162 Shape: Cushion Cutt...
Diamond, Sapphire, Gold, 18k Gold, Yellow Gold, Platinum
Platinum GIA 3.51ctw Clean Bright Colombian Emerald Wavy Diamond Ballerina Ring
Located in Montclair, NJ
Comes w/ original GIA certification for the emerald. Stock Number: MK-360225519 --Certification Details:-- Laboratory: GIA Report Number: 2231663295 Shape: Octagonal Cutting Style:...
Diamond, Emerald, Platinum
Platinum High Quality GIA 2.04ct No Heat Oval Vivid Red Ruby & Diamond Ring
Located in Montclair, NJ
Comes with original GIA certification for the ruby. Stock Number: MK-36090010 --Certification Details:-- Laboratory: GIA Report Number: 2235663359 Stone Shape: Oval Cutting Style: C...
Diamond, Ruby, Platinum
Platinum AGL 6.82ctw Ceylon Silky Velvety Blue Sapphire w/ Diamond Halo Ring
Located in Montclair, NJ
Stock Number: MK-880394018 --Certification Details:-- Laboratory: AGL Report Number: 1149956 Species - Variety: Natural Corundum - Sapphire Shape: Oval Cutting Style: Mixed Cut Tran...
Diamond, Sapphire, Platinum
Platinum 2.23ctw AGL Best Color Change Brazil Alexandrite Diamond 3 Oval Ring
Located in Montclair, NJ
Stock Number: MK-130824899 --Alexandrite Certification Details:-- Laboratory: AGL Report Number: 114842 Mineral Type - Variety: Natural Chrysoberyl - Alexandrite Shape: Oval Cutting...
Alexandrite, Diamond, Platinum
Tiffany & Co. Antique Art Deco Platinum Royal Blue No Heat Sapphire Diamond Ring
By Tiffany & Co.
Located in Montclair, NJ
Comes w/ the original GIA certification for the sapphire. Stock Number: MK-170801060 --Certification Details:-- Laboratory: GIA Report Number: 2231715148 Shape: Octagonal Cutting S...
Diamond, Sapphire, Platinum
18k Yellow Gold AGL 3.56ctw Fancy Pink Orange Ceylon Sapphire Diamond Ring
Located in Montclair, NJ
Comes w/ original AGL certification for the sapphire. Stock Number: MK-160340369 --Certification Details:-- Laboratory: AGL Report Number: 1150122 Mineral Type & Variety: Natural Co...
Diamond, Pink Sapphire, Gold, 18k Gold, Yellow Gold
Platinum GIA Large 7.38ctw Very Fine Colombian Emerald w/ Diamond Ballerina Ring
Located in Montclair, NJ
Comes w/ original GIA certification for the emerald. Stock Number: MK-460901349 --Certification Details:-- Laboratory: GIA Report Number: 2231666378 Shape: Octagonal Cutting Style:...
Diamond, Emerald, Platinum
14k Yellow Gold GIA Square Step Cut Channel Set Ruby 2.9mm Eternity Band Ring
Located in Montclair, NJ
Excellent overall condition. Come w/ GIA certification for 1 randomly picked ruby. Stock Number: MK-17032514 --Certification Details :-- Laboratory: GIA Report Number: 5232570645 Sh...
Ruby, Gold, 14k Gold, Yellow Gold
Antique Art Deco Platinum GIA 1.76ctw Old European Diamond Solitaire Ring
Located in Montclair, NJ
Stock Number: MK-760394306 --Certification Details:-- Laboratory: GIA Report Number: 6237699733 Shape: Old European Brilliant Measurements: 6.47 - 6.59 x 3.83 mm Carat Weight: 1.04 ...
Diamond, Platinum
14k Gold GIA 1.9ctw Imperial Precious Orange Topaz Diamond Teardrop Pendant
Located in Montclair, NJ
Comes w/ the original GIA certification for the topaz. Stock Number: MK-19087299 --Certification Details:-- Laboratory: GIA Report Number: 6237561323 Shape: Pear Cutting Style: Modi...
Diamond, Topaz, Gold, 14k Gold, Yellow Gold
18k Yellow Gold GIA 1.26ctw High Quality No Heat Vivid Red Ruby Diamond Ring
Located in Montclair, NJ
Comes with original GIA certification for the ruby. Stock Number: MK-160135133 --Certification Details:-- Laboratory: GIA Report Number: 5222822044 Stone Shape: Cushion Cutting Styl...
Diamond, Ruby, Gold, 18k Gold, Yellow Gold
Vintage Platinum Large GIA 27.68ctw Vivid Green Jade Ballerina Diamond Ring
Located in Montclair, NJ
Stock Number: MK-310229966 --Certification Details:-- Laboratory: GIA Report Number: 2233667834 Shape: Oval Cut: Double Cabochon Transparency: Translucent Color: Green Species: Jade...
Diamond, Jade, Platinum
Classic Platinum GIA 4.23ctw Burma Spinach Green A Jade w/ Diamond Ring
Located in Montclair, NJ
(top of the ring - north to south) - 15.7mm (0.61") (east to west - diamond to diamond), 2.5mm (bottom of the shank) Height: 10.4mm (rises off the finger) Stamp: PT900 - 3.53 - 0.70 ...
Diamond, Jade, Platinum
Platinum Large GIA 24.03ctw Burma Green A Jade w/ Diamond Halo Heavy Ring
Located in Montclair, NJ
(top of the ring - north to south) - 20.1mm (0.79") (east to west - diamond to diamond), 3.5mm (bottom of the shank) Height: 14.2mm (rises off the finger) Stamp: PT900 - 21.924ct- D2...
Diamond, Jade, Platinum
White Gold GIA 1.27ctw Oval Brazil Alexandrite Diamond 3 Stone Pendant Necklace
Located in Montclair, NJ
Comes w/ the original GIA certification for 1 randomly picked alexandrite. Stock Number: MK-14087013 --Certification Details:-- Laboratory: GIA Report Number: 1236649776 Shape: Oval...
Chrysoberyl, Diamond, Gold, White Gold
Platinum GIA 1.86ctw Clean Cushion No Heat Ruby w/ Baguette & Round Diamond Ring
Located in Montclair, NJ
Comes with original GIA certification for the ruby. Stock Number: MK-46089090 --Certification Details:-- Laboratory: GIA Report Number: 2235667865 Stone Shape: Cushion Cutting Style...
Diamond, Ruby, Platinum
Vintage Platinum Large 13.64ctw GIA Red Orange Play Opal Diamond Sides Ring
Located in Montclair, NJ
Excellent condition ring and ready to wear! Comes w/ GIA certification for the opal! Stock Number: MK-390291017 --Certification Details:-- Laboratory: GIA Report Number: 6233667858 ...
Diamond, Opal, Platinum
Platinum GIA 3.66ctw Cabochon Colombian Emerald & Diamond Bubble Sides Ring
Located in Montclair, NJ
Comes w/ original GIA certification for the emerald. Stock Number: MK-390104060 --Certification Details:-- Laboratory: GIA Report Number: 2235667830 Shape: Oval Cutting Style: Doub...
Diamond, Emerald, Platinum
Vintage Platinum GIA 2.72ctw Cabochon Star Ruby w/ Marquise & Round Diamond Ring
Located in Montclair, NJ
Comes w/ the original GIA certification for the Ruby. Stock Number: MK-130105013 --Certification Details:-- Laboratory: GIA Report Number: 2235686851 Shape: Oval Cutting Style: Dou...
Diamond, Ruby, Platinum
Platinum GIA 2.81ctw Oval Tanzanite w/ Diamond Sides Split Shank Cocktail Ring
Located in Montclair, NJ
Comes w/ original GIA certification for the tanzanite. Stock Number: MK-16056003 --Certification Details-- Laboratory: GIA Report Number: 5231642183 Stone Shape: Oval Crown Cutting ...
Diamond, Tanzanite, Platinum
Platinum GIA 3.42ctw No Heat Ceylon Color Change Sapphire w/ Diamond Halo Ring
Located in Montclair, NJ
Comes w/ the original GIA certification for the sapphire. Stock Number: MK-190356817 --Certification Details:-- Laboratory: GIA Report Number: 6233685238 Shape: Oval Cutting Style:...
Diamond, Purple Sapphire, Platinum
Platinum GIA 2.98ct Burma No Heat Star Ruby w/ Diamond Swirl Mini Ballerina Ring
Located in Montclair, NJ
Comes w/ the original GIA certification for the Ruby. Stock Number: MK-41086599 --Certification Details:-- Laboratory: GIA Report Number: 5232686836 Shape: Oval Cutting Style: Doub...
Diamond, Ruby, Platinum
Platinum GIA 6.55ctw Large Cushion Ceylon Sapphire w/ Diamond Cluster Sides Ring
Located in Montclair, NJ
Comes w/ the original GIA certification for the sapphire. Stock Number: MK-380536329 --Certification Details:-- Laboratory: GIA Report Number: 5231663362 Shape: Cushion Cutting Sty...
Diamond, Sapphire, Platinum
Solid Platinum Large GIA 6.37ctw Oval Ruby w/ Rose Cut Diamond Halo Ring
Located in Montclair, NJ
Comes with original GIA certification for the ruby. Stock Number: MK-910854133 --Certification Details:-- Laboratory: GIA Report Number: 6237646021 Stone Shape: Oval Cutting Style: ...
Diamond, Ruby, Platinum
Platinum GIA Burma Type A Jade w/ 0.92ctw Diamond Ballerina Cluster Ring
Located in Montclair, NJ
Stock Number: MK-31081517 --Certification Details:-- Laboratory: GIA Report Number: 1232658959 Shape: Oval Cut: Cabochon Transparency: Translucent Color: Green Species: Jadeite Jade...
Diamond, Jade, Platinum
18k Yellow Gold GIA 9.8ctw Oval Cabochon Sapphire w/ Baguette Diamond Sides Ring
Located in Montclair, NJ
Comes w/ the original GIA certification for the sapphire. Stock Number: MK-130331033 --Certification Details:-- Laboratory: GIA Report Number: 6237642063 Shape: Oval Cutting Style:...
Diamond, Sapphire, Gold, 18k Gold, Yellow Gold
18k White Gold GIA 2.20ctw Round Burma Ruby & Diamond Halo Bypass Spray Ring
Located in Montclair, NJ
Comes with original GIA certification for 1 randomly picked ruby. Stock Number: MK-160150530 --Certification Details:-- Laboratory: GIA Report Number: 2233642135 Stone Shape: Round ...
Diamond, Ruby, Gold, 18k Gold, White Gold
Platinum GIA 2.93ctw Oval Cabochon Black Opal W/ Diamond Halo & Sides Ring
Located in Montclair, NJ
Ring Measurements: 14.8mm (0.58") (north to south) , 14.6mm (0.57")(east to west, side to side, diamond to diamond), 3mm (bottom of the shank) Ring Height: 9.6mm rise off the finger ...
Diamond, Opal, Platinum
Vintage Platinum GIA 1.47ctw High Quality Burma Star Ruby w/ Diamond Ring
Located in Montclair, NJ
Comes with original GIA certification for the star ruby. Stock Number: MK-49053599 --Certification Details:-- Laboratory: GIA Report Number: 2231642060 Stone Shape: Oval Cutting Sty...
Diamond, Ruby, Platinum
Platinum High Quality GIA 1.81ct Vivid Fiery Red Ruby Baguette Diamond Wrap Ring
Located in Montclair, NJ
Comes with original GIA certification for the ruby. Stock Number: MK-190122590 --Certification Details:-- Laboratory: GIA Report Number: 5231601922 Stone Shape: Near-Round Cutting S...
Diamond, Ruby, 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.