Skip to main content

Square Mixed Cut

11
to
139
609
182
133
119
119
54
30
12
11
6
4
4
2
2
1
1
1
1
7
19
297
572
7
4
20
17
14
10
15
30
23
19
1
45
42
25
20
9
570
318
8
818
78
629
372
112
77
248
596
177
129
71
104
1
658
50
22
15
14
to
Sort By
Mesmerizing 3.49 Carat Square Mixed Cut Topaz Necklace
Located in רמת גן, IL
This enchanting necklace features a breathtaking square mixed-cut topaz as its centerpiece
Category

2010s Israeli Pendant Necklaces

Materials

Topaz, 14k Gold, Yellow Gold

Stunning .12ct. Square Mixed Cut Cluster Sapphire Ring with Side Diamonds
Located in רמת גן, IL
Stunning .12ct. Square Mixed Cut Cluster Sapphire Ring with Side Diamonds Product Details: Metal
Category

2010s Israeli Engagement Rings

Materials

Diamond, Sapphire, 18k Gold, White Gold

GIA 1.42 Carat F/VVS1 Cut-Cornered Square Mixed Cut Platinum Ring
Located in San Francisco, CA
color, VVS1 clarity Cut-Cornered Square Mixed Cut Diamond is set for all to admire in a classic four
Category

Early 2000s Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. Lucida Cut Diamond Platinum Ring
By Tiffany & Co.
Located in New York, NY
One Platinum pre owned Tiffany & Co diamond solitaire set with one Lucida cut-cornered square mixed
Category

21st Century and Contemporary American Modern Bridal Rings

Materials

Diamond, White Diamond, Platinum

Unique Platinum Solitaire Ring with 0.80 Ct Natural Diamonds, IGI Cert
Located in רמת גן, IL
Stunning solitaire platinum ring with 0.80 total carat of cut cornered square mixed cut diamond
Category

2010s Singaporean Solitaire Rings

Materials

Diamond, Platinum

Vintage GIA 1.30 Carat Square Cut Diamond Platinum Solitaire Ring
Located in Beverly Hills, CA
-cornered square mixed cut diamond of 1.30 carats, accompanied by GIA #11804409 stating the diamond is G
Category

1990s Solitaire Rings

Materials

Diamond, White Diamond, Brown Diamond, Platinum

Stunning Solitaire Platinum Ring with 0.80 total carat of Natural Diamond
By Tiffany & Co.
Located in רמת גן, IL
Stunning solitaire platinum ring with 0.80 total carat of cut cornered square mixed cut diamond
Category

2010s Singaporean Solitaire Rings

Materials

Diamond, Platinum

GIA Certified 1.03 Carat Diamond Platinum Engagement Ring by Tiffany & Co.
By Tiffany & Co.
Located in Beverly Hills, CA
color and VVS-1 clarity and inscribed Lucida (cut cornered square mixed cut diamond). With two tapered
Category

21st Century and Contemporary Contemporary Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. Platinum True Cut Diamond Engagement Ring .59ct TW FVS1
By Tiffany & Co.
Located in New York, NY
grams Current Retail: $6,850 Diamond Specifications Center Diamond Shape: Cut-Cornered Square Mixed-Cut
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. Diamond Engagement Ring in Platinum G-H VS1 1.01 CTW
By Tiffany & Co.
Located in New York, NY
Stone 1 Shape: Cut Cornered Square Mixed Cut Center Stone 1 Color: G-H Center Stone 1 Clarity: VS1 SIDE
Category

21st Century and Contemporary Solitaire Rings

Materials

Diamond, Platinum

18K White Gold Necklace w/ 0.34ct Sapphire and Natural Diamonds IGI Certificate
Located in רמת גן, IL
A sophisticated cluster ring with a dazzling 0.12-carat square mixed cut natural sapphire. It has
Category

2010s Israeli Cluster Rings

Materials

Diamond, Sapphire, 18k Gold, White Gold

Mid-Century GIA Madagascan No Heat Sapphire Diamond Platinum Ring
Located in Beverly Hills, CA
catch the sparkle of a stunning square mixed cut sapphire, approximately 1.65 carats and hailing from
Category

Vintage 1960s Cocktail Rings

Materials

Diamond, White Diamond, Sapphire, Blue Sapphire, Platinum

Tiffany & Co 0.42ct Lucida Diamond (G/IF) Solitaire 950 Platinum Engagement Ring
By Tiffany & Co.
Located in MELBOURNE, AU
box) ~~~ Performed in platinum 950, the ring features a cut cornered square (mixed cut) or Lucida
Category

2010s American Modern Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. Lucida Diamond Wedding Band in Platinum 0.11 CTW
By Tiffany & Co.
Located in New York, NY
Stone 1 Gem Type: Diamond Side Stone Weight 1 (cts): 0.11 Side Stone 1 Shape: Cut Cornered Square Mixed
Category

21st Century and Contemporary Wedding Rings

Materials

Platinum

AIG Certified 3.69 Carat Oval Peridot and 1.98 Carat Diamond Cocktail Ring
Located in Crema, Cremona
square mixed cuts diamonds, weight estimated at 0.78 carats, F/H color and VVS clarity.
Category

21st Century and Contemporary Modern Cocktail Rings

Materials

Diamond, Peridot, 18k Gold, White Gold

NO RESERVE! IGI 37.00Ct Emerald & 0.90Ct Diamonds - 18 kt. White gold - Earrings
By Diamonds Mine
Located in Ramat Gan, IL
Center Stone: ___________ Natural Emeralds Cut: Square Mixed Cut Carat: 37.00 tcw / 2 pieces Color
Category

2010s Israeli Art Deco Stud Earrings

Materials

Diamond, Emerald, White Gold, 18k Gold

1ct Diamond Square Cluster Ring 14k White Gold Sz 7 Engagement Jewelry Mixed Cut
Located in Torrance, CA
brilliant and baguette cut diamond total an estimated 1 carat (estimated at H-I color and SI1-I2 clarity
Category

21st Century and Contemporary Unknown Contemporary Engagement Rings

Materials

Diamond, White Diamond, Gold, 14k Gold, White Gold

Multi Gemstone Choker Necklace, Ring, Bracelet, and Earring Matching Set set in
By Unbranded
Located in New York, NY
Brilliant Cut Natural Diamonds Color G-H Clarity VS-SI equal 4.25 carats. 10 Square Mixed Cut Natural Rubies
Category

21st Century and Contemporary Chain Necklaces

Materials

18k Gold, Yellow Gold

Tiffany & Co. Lucida Split Shank Diamond Engagement Ring, Platinum D VVS2 0.70Ct
By Tiffany & Co.
Located in New York, NY
0.70Ct Condition Description: Tiffany & Co. patented the Lucida diamond cut, a mixed-cut style with
Category

21st Century and Contemporary Engagement Rings

Materials

Platinum

1930s Antique 5.31 Carat Amethyst and Diamond Gold Silver Set Pendant
Located in Jesmond, Newcastle Upon Tyne
. The pierced decorated silver setting displays a feature 5.31 Ct square mixed cut amethyst to the lower
Category

Mid-20th Century Unknown Pendant Necklaces

Materials

Amethyst, Diamond, Gold, 9k Gold, White Gold, Silver

Ladies Antique Mixed Metals Silver Palladium Rhodium Square Onyx Diamond Ring
Located in Houston, TX
. Bezel Set in 14 Karat Palladium White Gold with: One (1) natural, cut-corner rectangular-shaped, flat
Category

Late 20th Century Unknown Cocktail Rings

Materials

Diamond, Onyx, White Gold, Palladium, Rhodium, Silver, Mixed Metal

Sterling Silver Square Cut Citrine Gemstone Tennis Bracelet Grandma Gift
Located in Houston, TX
Beautifully handcrafted silver square citrine tennis bracelets, designed with love, including
Category

21st Century and Contemporary American Contemporary Tennis Bracelets

Materials

Citrine, Silver, Sterling Silver

Natural Square Cut Emerald Ring Diamond Setting 14K Yellow Gold
Located in Laguna Niguel, CA
It comes with the Gemological Appraisal by GIA GG/AJP All Gemstones are Natural Emerald = 0.68 Carat 34 Diamonds = 0.17 Carats Metal: 14K Yellow Gold Ring Size: 7* US *It can be resi...
Category

21st Century and Contemporary Contemporary Cocktail Rings

Materials

Diamond, White Diamond, Emerald, Gold, 14k Gold, Yellow Gold

Roman Malakov 20.18 Carat Total Mixed Cut Diamond Five-Stone Engagement Ring
By Roman Malakov
Located in New York, NY
Elegant and well crafted engagement ring showcasing a square emerald cut weighing 18.75 carats
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, Platinum

New .50ctw Rose Cut Black & White Diamond Ring, Sterling Silver Square Halo
Located in Greensboro, NC
: I2 Color: H - I; Black Cuts: Rose (solitaire) & Single (accents) Total Carats: 0.50ctw Style
Category

21st Century and Contemporary More Rings

Materials

White Diamond, Sterling Silver

Statement Square Cut Ruby Pushback Stud Earrings for Women in Sterling Silver
Located in Houston, TX
These gorgeous Statement Square Cut Ruby Pushback Stud Earrings are crafted from the finest
Category

21st Century and Contemporary American Art Deco Stud Earrings

Materials

Ruby, Silver, Sterling Silver

Natural Square Cut Zambian Emerald Ring Diamond Halo 14K Yellow Gold
Located in Laguna Niguel, CA
It comes with the Gemological Appraisal by GIA GG/AJP All Gemstones are Natural Zambian Emerald = 0.65 Carat 16 Diamonds = 0.16 Carats Metal: 14K Yellow Gold Ring Size: 7* US *It can...
Category

21st Century and Contemporary Contemporary Cocktail Rings

Materials

Diamond, White Diamond, Emerald, Gold, 14k Gold, Yellow Gold

1.1ct Square Aquamarine
Located in Toronto, Ontario
4.30 mm Shape: Square Cutting Style Crown: Step Cut Cutting Style Pavilion: Step Cut Transparency
Category

2010s Brazilian Loose Gemstones

Materials

Aquamarine

1.1ct Square Aquamarine
1.1ct Square Aquamarine
Free Shipping
W 0.24 in D 0.17 in L 0.25 in
1.58ct Square Aquamarine
Located in Toronto, Ontario
4.86 mm Shape: Square Cutting Style Crown: Step Cut Cutting Style Pavilion: Step Cut Transparency
Category

2010s Brazilian Loose Gemstones

Materials

Aquamarine

1.58ct Square Aquamarine
1.58ct Square Aquamarine
Free Shipping
W 0.28 in D 0.2 in L 0.28 in
1.17ct Square Aquamarine
Located in Toronto, Ontario
4.28 mm Shape: Square Cutting Style Crown: Step Cut Cutting Style Pavilion: Step Cut Transparency
Category

2010s Brazilian Loose Gemstones

Materials

Aquamarine

1.17ct Square Aquamarine
1.17ct Square Aquamarine
Free Shipping
W 0.26 in D 0.17 in L 0.26 in
5.54 Carat Natural Mixed Cut Diamond Tennis Bracelet in 14K White Gold ref367
By Diamond Town
Located in New York, NY
round and 26 square diamonds, with a combined weight of 5.54 carats. The alternating pattern of round
Category

21st Century and Contemporary Contemporary Tennis Bracelets

Materials

Diamond, White Diamond, 14k Gold, White Gold

35.21 ct Square Ametrine
Located in Toronto, Ontario
mm Shape: Square Cutting Style Crown: Step Cut Cutting Style Pavilion: Mixed Cut Transparency
Category

2010s Bolivian Loose Gemstones

Materials

Alexandrite

35.21 ct Square Ametrine
35.21 ct Square Ametrine
Free Shipping
W 0.73 in D 0.52 in L 0.7 in
14 Karat Yellow Gold Square Cut .45 Carat Ruby and Round Diamond Fashion Ring
Located in Milford, DE
A classy ring with a brilliant sparkle. Features 9 square-cut, open back genuine rubies (.05 ct
Category

Mid-20th Century Cocktail Rings

Materials

Diamond, Ruby, 14k Gold

26.35 ct Square Ametrine
Located in Toronto, Ontario
: 18.20x16.20x11.70 mm Shape: Square Cutting Style Crown: Step Cut Cutting Style Pavilion: Mixed Cut Transparency
Category

2010s Bolivian Loose Gemstones

Materials

Amazonite

26.35 ct Square Ametrine
26.35 ct Square Ametrine
Free Shipping
W 0.72 in D 0.47 in L 0.64 in
43.02 ct Square Ametrine
Located in Toronto, Ontario
: 21.30x20.80x11.80 mm Shape: Square Cutting Style Crown: Step Cut Cutting Style Pavilion: Mixed Cut Transparency
Category

2010s Bolivian Loose Gemstones

Materials

Aquamarine

43.02 ct Square Ametrine
43.02 ct Square Ametrine
Free Shipping
W 0.84 in D 0.47 in L 0.82 in
13.22 Carats Total Round Diamond and Square Cut Blue Sapphire Tennis Bracelet
Located in New York, NY
An beautiful art deco bracelet showcasing a line of square cut blue sapphires weighing 9.20 carats
Category

Late 20th Century American Art Deco Retro Bracelets

Materials

Sapphire, Blue Sapphire, Diamond, 18k Gold, White Gold

26.55 ct Square Ametrine
Located in Toronto, Ontario
mm Shape: Square Cutting Style Crown: Step Cut Cutting Style Pavilion: Step Cut Transparency
Category

2010s Bolivian Loose Gemstones

Materials

Amazonite

26.55 ct Square Ametrine
26.55 ct Square Ametrine
Free Shipping
W 0.69 in D 0.44 in L 0.68 in
32.35 ct Square Ametrine
Located in Toronto, Ontario
mm Shape: Square Cutting Style Crown: Step Cut Cutting Style Pavilion: Step Cut Transparency
Category

2010s Bolivian Loose Gemstones

Materials

Agate

32.35 ct Square Ametrine
32.35 ct Square Ametrine
Free Shipping
W 0.72 in D 0.52 in L 0.63 in
33.59 ct Square Ametrine
Located in Toronto, Ontario
mm Shape: Square Cutting Style Crown: Step Cut Cutting Style Pavilion: Step Cut Transparency
Category

2010s Bolivian Loose Gemstones

Materials

Alexandrite

33.59 ct Square Ametrine
33.59 ct Square Ametrine
Free Shipping
W 0.71 in D 0.48 in L 0.69 in
39.25 ct Square Ametrine
Located in Toronto, Ontario
: 20.60x19.40x11.50 mm Shape: Square Cutting Style Crown: Step Cut Cutting Style Pavilion: Step Cut Transparency
Category

2010s Bolivian Loose Gemstones

Materials

Alexandrite

39.25 ct Square Ametrine
39.25 ct Square Ametrine
Free Shipping
W 0.82 in D 0.46 in L 0.77 in
31.87 ct Square Ametrine
Located in Toronto, Ontario
Shape: Square Cutting Style Crown: Modified Brilliant Cutting Style Pavilion: Step Cut Transparency
Category

2010s Bolivian Loose Gemstones

Materials

Agate

31.87 ct Square Ametrine
31.87 ct Square Ametrine
Free Shipping
W 0.71 in D 0.52 in L 0.67 in
Square Octogen Cut Zambian Emerald Unisex Ring with Diamonds in 18k White Gold
By Artisan NYC
Located in New York, NY
"18KT:6.300g, Diamond:0.66ct, Emerald:3.63ct, Size: US-7"
Category

21st Century and Contemporary Indian Artisan Cocktail Rings

Materials

Diamond, Emerald, 18k Gold, White Gold

Square Black Onyx Cufflinks with Brilliant Cut Diamonds in 14Kt Yellow Gold
By Nicofilimon the Jewelry Designer
Located in Athens, GR
mixed and matched, for a truly unique style. Title: Square Black Onyx Cufflinks Collection
Category

2010s Greek Contemporary Cufflinks

Materials

Onyx, Diamond, Gold, 14k Gold, Yellow Gold

Emerald and 2.62 Carat Diamond Platinum Cocktail Ring
Located in Jesmond, Newcastle Upon Tyne
Colour Green Cut Square mixed Content 0.68 carats Diamond Quality Feature Diamond Colour N Clarity VS2
Category

Antique Early 1900s Cocktail Rings

Materials

Diamond, Emerald, Platinum

Square Ruby and Diamond Cufflinks
Located in New York, NY
A stylish pair of fine rubies and diamond square cufflinks, circa 1980.
Category

Vintage 1980s Cufflinks

Materials

Diamond, Ruby, White Gold

28.09ct Square Purple Amethyst from Uruguay
Located in Toronto, Ontario
13.92 mm Shape: Cut Corner Square Cutting Style: Cutting Style Crown: Step Cut Cutting Style Pavilion
Category

2010s Uruguayan Loose Gemstones

Materials

Amethyst

28.09ct Square Purple Amethyst from Uruguay
28.09ct Square Purple Amethyst from Uruguay
Free Shipping
W 0.73 in D 0.55 in L 0.72 in
1930s 3.61 Carat Citrine and 1.20 Carat Diamond Yellow Gold Cocktail Ring
Located in Jesmond, Newcastle Upon Tyne
3.61Ct square mixed cut citrine. The scalloped edged palladium frame that surrounds the central citrine
Category

Vintage 1930s Unknown Cocktail Rings

Materials

Citrine, Diamond, Gold, 18k Gold, Yellow Gold

1.53ct Square Aquamarine
Located in Toronto, Ontario
5.09 mm Shape: Square Cutting Style Crown: Brilliant Cut Cutting Style Pavilion: Mixed Cut Transparency
Category

2010s Brazilian Loose Gemstones

Materials

Aquamarine

1.53ct Square Aquamarine
1.53ct Square Aquamarine
Free Shipping
W 0.27 in D 0.21 in L 0.27 in
1.9ct Square Aquamarine
Located in Toronto, Ontario
5.08 mm Shape: Square Cutting Style Crown: Brilliant Cut Cutting Style Pavilion: Mixed Cut Transparency
Category

2010s Brazilian Loose Gemstones

Materials

Aquamarine

1.9ct Square Aquamarine
1.9ct Square Aquamarine
Free Shipping
W 0.3 in D 0.2 in L 0.3 in
1.14ct Square orangy Yellow Tourmaline from Brazil
Located in Toronto, Ontario
3.44 mm Shape: Square Cutting Style Crown: Step Cut Cutting Style Pavilion: Step Cut Transparency
Category

2010s Brazilian Loose Gemstones

Materials

Tourmaline

1.14ct Square orangy Yellow Tourmaline from Brazil
1.14ct Square orangy Yellow Tourmaline from Brazil
Free Shipping
W 0.27 in D 0.14 in L 0.27 in
2.34ct Square purplish Pink Tourmaline from Brazil
Located in Toronto, Ontario
x 4.30 mm Shape: Square Cutting Style Crown: Step Cut Cutting Style Pavilion: Step Cut Transparency
Category

2010s Brazilian Loose Gemstones

Materials

Tourmaline

2.34ct Square purplish Pink Tourmaline from Brazil
2.34ct Square purplish Pink Tourmaline from Brazil
Free Shipping
W 0.33 in D 0.17 in L 0.33 in
2.55ct Square Violet Blue Tanzanite from Tanzania
Located in Toronto, Ontario
4.58 mm Shape: Square Cutting Style Crown: Step Cut Cutting Style Pavilion: Step Cut Transparency
Category

2010s Tanzanian Loose Gemstones

Materials

Tanzanite

2.55ct Square Violet Blue Tanzanite from Tanzania
2.55ct Square Violet Blue Tanzanite from Tanzania
Free Shipping
W 0.34 in D 0.19 in L 0.32 in
Vintage 1.77 Carat Aquamarine and Diamond White Gold Cocktail Ring
Located in Jesmond, Newcastle Upon Tyne
ornamented with a feature 1.77Ct square mixed cut aquamarine, four claw set in relief to the center of the
Category

1990s Unknown Cocktail Rings

Materials

Aquamarine, Diamond, 18k Gold, White Gold

Baroque Pearl Emerald Square Drop Earrings
By Jaipur Atelier
Located in Los Angeles, CA
Luminous elongated Baroque Pearl drop earrings set with Emeralds in 22 karat gold... a modern and unique interpretation of classic 'Kundan' - setting a gem stone in 22 karat gold. -...
Category

21st Century and Contemporary Contemporary Drop Earrings

Materials

Emerald, Pearl, 22k Gold

15.49 Carat Ruby Square Bangle Bracelet
By Meghna Jewels
Located in Hoffman Estate, IL
A beautiful bracelet handmade in sterling silver and set in 15.49 carats ruby. Also available in blue sapphire. FOLLOW MEGHNA JEWELS storefront to view the latest collection & excl...
Category

21st Century and Contemporary Unknown Modern Modern Bracelets

Materials

Ruby, Sterling Silver

Mixed Cut White & Yellow Diamond Pyramid Earrings, 18 karat yellow & white gold
Located in Lakewood, NJ
The 18-karat yellow and white gold Mixed Cut White & Yellow Diamond Pyramid Earrings totaling 20.04
Category

2010s Dangle Earrings

Materials

Yellow Diamond, 18k Gold

Earrings 18kt Gold Square Emerald 2.04 cts & Marquise Illusion Diamonds 0.42 cts
Located in Miami, FL
sophistication to these earrings. Earrings 18kt Mixed Gold (White and Yellow gold) Square Emerald 2.04 carats
Category

2010s American Contemporary Stud Earrings

Materials

Diamond, Emerald, Gold

Blue Sapphire and Diamond Square Ring
Located in Boca Raton, FL
18K White Gold and Diamond Square Ring with Multi-Shape Blue Sapphires Sapphires are pear shapes
Category

21st Century and Contemporary American Cocktail Rings

Materials

Diamond, Blue Sapphire, 18k Gold, White Gold

Ring 18kt Gold Square GIA Emerald 1.58 cts & Diamonds Pave 0.59 cts
Located in Miami, FL
sure to capture attention. Crafted from 18kt Mixed Gold, the magnificent Ring comes enriched with one
Category

2010s American Contemporary Cocktail Rings

Materials

Diamond, Emerald

1.23ct Square Pink & Green Bi-Colour Tourmaline from Brazil
Located in Toronto, Ontario
: 5.95 x 5.80 x 4.15 mm Shape: Square Cutting Style Crown: Step Cut Cutting Style Pavilion: Step Cut
Category

2010s Brazilian Loose Gemstones

Materials

Tourmaline

1.23ct Square Pink & Green Bi-Colour Tourmaline from Brazil
1.23ct Square Pink & Green Bi-Colour Tourmaline from Brazil
Free Shipping
W 0.24 in D 0.17 in L 0.23 in
  • 1
  • ...
Get Updated with New Arrivals
Save "Square Mixed Cut", and we’ll notify you when there are new listings in this category.

Square Mixed Cut For Sale on 1stDibs

On 1stDibs, you can find the most appropriate square mixed cut for your needs in our varied inventory. Frequently made of Gold, 18k Gold and Yellow Gold, this item was constructed with great care. In our selection of items, you can find a vintage example as well as a contemporary version. Finding the perfect square mixed cut may mean sifting through those created during different time periods — you can find an early version that dates to the 20th Century and a newer variation that were made as recently as the 21st Century. A square mixed cut from BOON, Meghna Jewels and Intini Jewels — each of whom created a beautiful version of this treasured accessory — is worth considering. Take a look at a square mixed cut featuring Diamond from our inventory today to add the perfect touch to your look. Today, if you’re looking for a mixed cut version of this piece and are unable to find the perfect match, our selection also includes square cut and emerald cut alternatives. If you’re browsing our inventory for a square mixed cut, you’ll find that many are available today for women, but there are still pieces to choose from for unisex and men.

How Much is a Square Mixed Cut?

Prices for a square mixed cut can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $303 and can go as high as $35,000, while this accessory, on average, fetches $3,825.
Questions About Square Mixed Cut
  • 1stDibs ExpertApril 5, 2022
    Emeralds are frequently cut into squares due to their properties. Because they are brittle, the gemstones benefit from stronger rectangular and square shapes. Also, these cuts tend to hide the natural blemishes found in many emeralds. Shop a large selection of emerald gemstone jewelry on 1stDibs.
  • 1stDibs ExpertApril 5, 2022
    No, a square emerald cut is not the same as an asscher cut. Although they have the same basic shape and are both step cuts that maximize clarity, the asscher cut shows off a sharper angle at the corners. Shop a wide variety of gemstone jewelry on 1stDibs.