Skip to main content

Untreated Sapphire

to
145
660
494
303
257
231
1,155
628
442
144
134
3
59
249
929
12
9
21
26
13
18
14
10
18
3
3
677
538
27
397
148
122
90
48
to
228
33
18
18
16
175
167
100
47
32
26
19
10
3
2
1
1,226
16
645
487
Sort By
IGI Certified Untreated Deep Blue Sapphire 1.01ct Pear Cut Gold Pendant Necklace
By Gems and Jewels UK
Located in Birmingham, GB
Natural untreated deep blue sapphire solitaire pendant. Beautiful pear cut Sapphire. Set in a fine
Category

21st Century and Contemporary Pendant Necklaces

Materials

Sapphire, Blue Sapphire, Gold, Yellow Gold

Fine Orange Pink Untreated Unheated Sapphire 0.60ct Heart Cut Loose Gem 5x5.2mm
Located in Birmingham, GB
Fine Orange Pink Untreated Unheated Sapphire 0.60ct Heart Cut Loose Gem 5x5.2mm Natural Untreated
Category

21st Century and Contemporary British Loose Gemstones

Materials

Sapphire, Pink Sapphire

IGI Certified 1.47ct Untreated Blue Green Teal Sapphire 18k White Gold Pendant
By Gems and Jewels UK
Located in Birmingham, GB
Untreated Deep Blue-Green Australian Sapphire 18k White Gold Pendant. IGI Certified 1.47 carat
Category

21st Century and Contemporary Pendant Necklaces

Materials

Sapphire, Blue Sapphire, Green Sapphire, Gold, 18k Gold, White Gold

GIA Certified 1.12ct Untreated Green Blue Sapphire Oval 18k White Gold Pendant
By Gems and Jewels UK
Located in Birmingham, GB
GIA Certified Untreated Deep Green Blue Sapphire 18k White Gold Solitaire Pendant Necklace. 1.12
Category

21st Century and Contemporary Pendant Necklaces

Materials

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

GIA Certified 2.51ct Untreated Deep Blue Sapphire Oval 18k Yellow Gold Pendant
By Gems and Jewels UK
Located in Birmingham, GB
Fine GIA Certified Untreated Deep Blue Sapphire Oval 18k Yellow Gold Pendant Necklace. Untreated
Category

21st Century and Contemporary Pendant Necklaces

Materials

Sapphire, Blue Sapphire, Gold, 18k Gold, Yellow Gold

IGI Certified Untreated Ceylon 1.22ct Light Yellow Sapphire 14 Karat Gold Ring
By Gems and Jewels UK
Located in Birmingham, GB
Stunning untreated light yellow Ceylon sapphire set in a fine 14k white gold ring. Sapphire is
Category

2010s Solitaire Rings

Materials

Sapphire, Yellow Sapphire, 14k Gold, White Gold

Untreated Lilac Ceylon Sapphire Ring by Raymond Yard, 5.10 Carats
By Raymond C. Yard
Located in New Orleans, LA
A brilliant-cut sapphire displays an elegant and desirable lilac hue in this creation from the
Category

20th Century American Retro Cocktail Rings

Materials

Diamond, Sapphire, Platinum

Untreated Pink Sapphire 1.01 Carat Round Cut 18 Karat Gold Solitaire Pendant
Located in Birmingham, GB
Natural untreated vivid pink sapphire solitaire pendant. Beautiful round cut Sapphire. Set in a
Category

21st Century and Contemporary Pendant Necklaces

Materials

Sapphire, Pink Sapphire, Gold, 18k Gold, Yellow Gold

GIA Certified Untreated Pink Purple Sapphire Pendant 18k Gold Round Diamond Cut
By Gems and Jewels UK
Located in Birmingham, GB
18k yellow gold pendant setting. Totally untreated and unheated. Very rare for Sapphires. 0.71
Category

21st Century and Contemporary Pendant Necklaces

Materials

Sapphire, Pink Sapphire, Gold, 18k Gold, Yellow Gold

IGI Certified Untreated Deep Blue Ceylon Sapphire Pear Solitaire White Gold Ring
By Gems and Jewels UK
Located in Birmingham, GB
Stunning deep blue Ceylon sapphire set in a fine 14k white gold solitaire ring. Sapphire fully
Category

2010s Solitaire Rings

Materials

Sapphire, Blue Sapphire, 14k Gold, White Gold

IGI Certified Untreated Blue Sapphire Pear Cut Solitaire 18 Karat Gold Pendant
By Gems and Jewels UK
Located in Birmingham, GB
Beautiful Natural IGI Certified Untreated Blue Sapphire set in a fine 18k white gold solitaire
Category

21st Century and Contemporary Pendant Necklaces

Materials

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

IGI Certified Untreated 1.00 Carat Cognac Yellow Sapphire 14 Karat Gold Pendant
By Gems and Jewels UK
Located in Birmingham, GB
Natural bright brownish yellow sapphire solitaire gold pendant. Beautiful pear cut Sapphire with a
Category

21st Century and Contemporary Pendant Necklaces

Materials

Sapphire, Yellow Sapphire, Gold, 14k Gold, Yellow Gold

Boucheron Natural Untreated 12.80 Carat Sapphire Diamond Ring Set in Platinum
By Boucheron
Located in London, GB
A Boucheron natural untreated 12.80 carat sapphire diamond ring set in platinum, circa 1950. This
Category

Vintage 1950s French Art Deco Cocktail Rings

Materials

Diamond, Sapphire, Platinum

Untreated Vivid Pink Sapphire 1.00 Carat Solitaire Oval Cut Yellow Gold Pendant
By Gems and Jewels UK
Located in Birmingham, GB
Natural untreated vivid pink sapphire solitaire pendant. Beautiful oval cut pink Sapphire. Set in
Category

21st Century and Contemporary Pendant Necklaces

Materials

Sapphire, Pink Sapphire, Gold, 14k Gold, Yellow Gold

IGI Certified 11.7ct Untreated Star Sapphire and 0.53ct Diamonds Platinum Ring
Located in Hong Kong, HK
natural Untreated Star Sapphire – a rare gem that captures light with its enchanting asterism effect
Category

21st Century and Contemporary Hong Kong Cocktail Rings

Materials

Diamond, Star Sapphire, Platinum

Natural GIA CERTIFIED Colour Change Sapphire 1.00ct UNTREATED Oval Cut RARE Gem
By Gems and Jewels UK
Located in Birmingham, GB
Natural GIA CERTIFIED Colour Change Sapphire 1.00ct UNTREATED Oval Cut RARE Gem GIA Certified Rare
Category

21st Century and Contemporary More Jewelry

Materials

Sapphire

1.49ct Untreated Colour Change Sapphire Green Blue Round Cut IGI Certified Gem
Located in Birmingham, GB
1.49ct Untreated Colour Change Sapphire Green Blue Round Cut IGI Certified Gem Rare Natural Colour
Category

21st Century and Contemporary More Jewelry

Materials

Sapphire

9.53 Carat Lavender Chalcedony Oval Cabochon Yellow Gold Ring, Lola Brooks, 2022
Located in Dallas, TX
things by hand, the award-winning maker often implements hand-selected untreated sapphires, tourmalines
Category

2010s American Artist Fashion Rings

Materials

Chalcedony, Gold, 18k Gold, Yellow Gold

1.91 Carat, Natural, Untreated, Ceylon Sapphire Tank Ring Set in Platinum
Located in Tokyo, JP
A beautiful GIA certified 1.91 Carat Oval-Shaped, Natural, Ceylon Sapphire Tank Ring set in
Category

21st Century and Contemporary Japanese Modern Engagement Rings

Materials

Sapphire, Platinum

GIA Certified Untreated Deep Teal Blue Thailand Sapphire 1.99 Carat Oval Cut Gem
By Gems and Jewels UK
Located in Birmingham, GB
GIA confirming stone as natural and untreated. Very rare for natural sapphires.
Mined in Thailand
Category

21st Century and Contemporary Solitaire Rings

Materials

Sapphire, Blue Sapphire

Fine Deep Blue Untreated 0.76ct Sapphire Oval Cut IGI Certified Unheated Blister
Located in Birmingham, GB
Fine Deep Blue Untreated 0.76ct Sapphire Oval Cut IGI Certified Unheated Blister Fine Deep Blue
Category

21st Century and Contemporary More Jewelry

Materials

Sapphire

Rare Australian Untreated Green Yellow Blue Bi Colour Sapphire 0.81ct Oval Cut
Located in Birmingham, GB
Rare Australian Untreated Green Yellow Blue Bi Colour Sapphire 0.81ct Oval Cut Rare Greenish
Category

21st Century and Contemporary More Jewelry

Materials

Sapphire

GIA Certified 6.00 Carat Oval Blue Sapphire Unheated Untreated Diamond Ring, 18K
By Five Star Jewelry
Located in Austin, TX
The sapphire and diamond ring is the original engagement ring. In England every royal family has a
Category

21st Century and Contemporary Engagement Rings

Materials

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

IGI Certified 1.20 Carat Untreated Ceylon Yellow Sapphire and Diamond Gold Ring
Located in Birmingham, GB
Fine natural vivid yellow Ceylon sapphire & diamond white gold ring. 1.20 carat yellow sapphire
Category

21st Century and Contemporary Three-Stone Rings

Materials

Diamond, White Diamond, Sapphire, Yellow Sapphire, Gold, 14k Gold, White...

GIA Certified 1.01 Carat Untreated Ceylon Blue Sapphire, Gold and Diamond Ring
By Gems and Jewels UK
Located in Birmingham, GB
Stunning natural blue Ceylon sapphire set in a fine 18k white gold diamond halo ring. 1.01 carat
Category

21st Century and Contemporary Cluster Rings

Materials

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

6.46 Carat Pink Ceylon Emerald Cut Sapphire Diamond Platinum Ring AGL Untreated
Located in Boca Raton, FL
Rare Pink Ceylon Sapphire Diamond Ring fashioned in platinum. The emerald cut Pink Ceylon Sapphire
Category

Late 20th Century Unknown Modern Cocktail Rings

Materials

Diamond, Sapphire, Pink Sapphire, Platinum

6.98 Carat Natural Untreated No Heat Sapphire Ring Set in Platinum Gold
Located in Tokyo, JP
A beautiful Cocktail ring featuring a 6.98 Carat Natural Untreated 'No Heat" Sapphire and 1.58
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum, Gold, 18k Gold

Untreated Vivid Pink Sapphire and Diamond 18 Karat White Gold Pendant Necklace
By Gems and Jewels UK
Located in Birmingham, GB
sparkly! Also totally untreated and unheated. Very rare for sapphires, especially of this quality! The
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, White Diamond, Sapphire, Pink Sapphire, Gold, 18k Gold, White Gold

AIG Certified Color Change Sapphire Blue Purple Untreated Pear Cut No Heat
Located in Birmingham, GB
AIG Certified Colour Change Sapphire Blue Purple Untreated Pear Cut No Heat Rare Untreated Colour
Category

21st Century and Contemporary British More Jewelry

Materials

Sapphire

AGL Certified 8.463 ct. Unheated Untreated Blue Sapphire Fine Diamond Ring
Located in Aspen, CO
by man - it is unheated and untreated. This Report is older (as this sapphire is from an old mine
Category

21st Century and Contemporary North American Contemporary Cocktail Rings

Materials

Diamond, Blue Sapphire, Platinum

IGI Certified 19.82ct Untreated Burma Star-Sapphire 4.01ct Diamonds Gold Ring
Located in Hong Kong, HK
elegance with our untreated Burma star sapphire ring—a mesmerizing greyish-blue gem exhibiting a stunning
Category

21st Century and Contemporary Hong Kong Cocktail Rings

Materials

Diamond, Star Sapphire, Gold, 18k Gold, White Gold

Marlene Stowe diamond 18k yellow gold ring
By Marlene Stowe
Located in Beverly Hills, CA
-century French design. With its untreated sapphire, exceptional diamonds, and refined silhouette, it is a
Category

Vintage 1980s Contemporary Cocktail Rings

Materials

Diamond, Gold, 18k Gold, Yellow Gold

Royal Blue 2.36 Carat Untreated Burmese Sapphire Diamond Ring Set in Platinum
Located in Tokyo, JP
A stunning Engagement/Cocktail Ring featuring a GIA Certified 2.36 Carat Royal Blue, Untreated
Category

2010s Japanese Modern Engagement Rings

Materials

Diamond, Sapphire, Platinum

Harry Winston Cluster Ceylon Sapphire and Diamond Ring in Platinum Setting
By Harry Winston
Located in Neguri, Vizcaya
HARRY WINSTON Ceylon Sapphire Ring with Diamonds and platinum setting Untreated sapphire from Sri
Category

Late 20th Century American Dome Rings

Materials

Diamond, Sapphire, Platinum

Large Oval Dendritic Agate Oval Drop Yellow Gold Earrings, Lola Brooks 2023
Located in Dallas, TX
fabricating beautiful things by hand, the award-winning maker often implements hand-selected untreated
Category

2010s American Artist Dangle Earrings

Materials

Agate, Gold, 18k Gold, Yellow Gold

Oval Purple Blue Tanzanite Cabochon Yellow Gold Dome Ring, Lola Brooks, 2022
Located in Dallas, TX
things by hand, the award-winning maker often implements hand-selected untreated sapphires, tourmalines
Category

2010s American Contemporary Cocktail Rings

Materials

Tanzanite, Gold, 18k Gold, Yellow Gold

7.82 Carat Ombre Aqua Tourmaline Oval Yellow Gold Solitaire Ring, Lola Brooks
Located in Dallas, TX
award-winning maker often implements hand-selected untreated sapphires, tourmalines, diamonds, and other
Category

2010s American Artist Solitaire Rings

Materials

Tourmaline, Gold, 18k Gold, Yellow Gold

One of a Kind Rainbow Australian Opal 22k Oval Drop Earrings, Lola Brooks 2023
Located in Dallas, TX
award-winning maker often implements hand-selected untreated sapphires, tourmalines, diamonds, and other
Category

2010s American Artist Drop Earrings

Materials

Opal, Gold, 18k Gold, Yellow Gold

Platinum Rutilated Quartz Yellow Gold Pendant Drop Necklace, Lola Brooks 2023
Located in Dallas, TX
implements hand-selected untreated sapphires, tourmalines, diamonds, and other unusual rare gems into her
Category

2010s American Artist Drop Necklaces

Materials

Quartz, Gold, 18k Gold, Yellow Gold

Glowing Deep Blue Indicolite Tourmaline Drop Yellow Gold Necklace, Lola Brooks
Located in Dallas, TX
fabricating beautiful things by hand, the award-winning maker often implements hand-selected untreated
Category

2010s American Artist Drop Necklaces

Materials

Tourmaline, Indicolite, Gold, 18k Gold, Yellow Gold

Lola Brooks Rose Cut Faceted Labradorite Handmade Gold Drop Earrings
Located in Dallas, TX
-selected untreated sapphires, tourmalines, diamonds, and other unusual rare gems into her signature
Category

2010s American Artisan Dangle Earrings

Materials

Labradorite, Gold, 18k Gold, Yellow Gold

Lola Brooks Fiery Boulder Opal Handmade 22k Chain One of a Kind ID Bracelet
Located in Dallas, TX
by hand, the award-winning maker often implements hand-selected untreated sapphires, tourmalines
Category

21st Century and Contemporary American Artisan Link Bracelets

Materials

Opal, Gold, Yellow Gold, 22k Gold

Deep Blue Indicolite Tourmaline Faceted Octagon Gold Ring, Lola Brooks
Located in Dallas, TX
untreated sapphires, tourmalines, diamonds, and other unusual rare gems into her signature-finished 18k and
Category

2010s American Artist Cocktail Rings

Materials

Tourmaline, Indicolite, 18k Gold, Yellow Gold, Gold

Lola Brooks 5.06 Carat Faceted Diamond 22k Gold One of a Kind Ring
Located in Dallas, TX
-selected untreated sapphires, tourmaline, diamonds, and other unusual rare gems into her signature
Category

2010s American Artisan Cocktail Rings

Materials

Diamond, Gold, Yellow Gold, 22k Gold

Faceted Labradorite Octagon One of a Kind Pendant Necklace, Lola Brooks 2022
Located in Dallas, TX
fabricating beautiful things by hand, the award-winning maker often implements hand-selected untreated
Category

2010s American Artist Pendant Necklaces

Materials

Labradorite, Gold, 18k Gold, Yellow Gold

Oval Purple Blue Tanzanite Cabochon Yellow Gold Dome Ring, Lola Brooks, 2022
Located in Dallas, TX
things by hand, the award-winning maker often implements hand-selected untreated sapphires, tourmalines
Category

2010s American Contemporary Cocktail Rings

Materials

Tanzanite, Gold, Yellow Gold, 18k Gold

4.23ct Salt Pepper White Black Diamond One-of-a-Kind Solitaire Ring, Lola Brooks
Located in Dallas, TX
implements hand-selected untreated sapphires, tourmalines, diamonds, and other unusual rare gems into her
Category

2010s American Artist Cocktail Rings

Materials

Diamond, White Diamond, Black Diamond, Gold, Yellow Gold, 22k Gold

Lola Brooks 36.85 Carat Faceted Moonstone Drop Earrings in 18k Yellow Gold
Located in Dallas, TX
untreated sapphires, tourmalines, diamonds, and other unusual rare gems into her signature-finished 18k and
Category

2010s American Artist Dangle Earrings

Materials

Moonstone, Gold, 18k Gold, Yellow Gold

6.87 carat Faceted Hot Pink Ruby Yellow Gold Drop Necklace, Lola Brooks 2023
Located in Dallas, TX
fabricating beautiful things by hand, the award-winning maker often implements hand-selected untreated
Category

2010s American Artist Drop Necklaces

Materials

Ruby, Gold, 18k Gold, Yellow Gold

0.81ct Parti Bi Colour Sapphire Untreated Blue Green Yellow Round Cut Loose Gem
Located in Birmingham, GB
0.81ct Parti Bi Colour Sapphire Untreated Blue Green Yellow Round Cut Loose Gem Rare Untreated
Category

21st Century and Contemporary British Loose Gemstones

Materials

Sapphire

Victorian 18 Karat Gold Untreated 10.73 Carat Burma Sapphire and Diamond Ring
Located in Cape May, NJ
Era: Victorian Composition: 18K Yellow Gold Primary Stone: Natural, Untreated Burma(Myanmar
Category

Antique Late 19th Century Victorian Engagement Rings

Materials

Diamond, Sapphire, Gold, 18k Gold, Yellow Gold

Fine Australian Blue Purple Sapphire Untreated 0.53ct Cushion Cut Gem
Located in Birmingham, GB
Fine Australian Blue Purple Sapphire Untreated 0.53ct Cushion Cut Gem 4.5x4.2mm Natural Fine Blue
Category

21st Century and Contemporary More Jewelry

20 Carat Light Blue Untreated Star Sapphire Ring with Diamonds in White Gold
Located in Miami, FL
central 20 carat light blue, untreated Star Sapphire, set in 14K white gold with cross-hatched accents
Category

Mid-20th Century American Art Deco Dome Rings

Materials

Diamond, Star Sapphire, Gold, 14k Gold, White Gold

One of a Kind Rose-Cut Emerald 22k Gold Triple Drop Earrings, Lola Brooks 2023
Located in Dallas, TX
things by hand, the award-winning maker often implements hand-selected untreated sapphires, tourmalines
Category

2010s American Modern Drop Earrings

Materials

Emerald, Gold, 18k Gold, Yellow Gold, 22k Gold

Epic 52.38ct Boulder Opal 22k Gold Handmade Chain Necklace, Lola Brooks 2022
Located in Dallas, TX
untreated sapphires, tourmalines, diamonds, and other unusual rare gems into her signature-finished 18k and
Category

2010s American Artist Pendant Necklaces

Materials

Opal, Gold, 18k Gold, Yellow Gold, 22k Gold

Fine Blue Ethiopian Opal Oval Cabochon Dangle Drop Earrings, Lola Brooks, 2022
Located in Dallas, TX
implements hand-selected untreated sapphires, tourmalines, diamonds, and other unusual rare gems into her
Category

2010s American Artist Drop Earrings

Materials

Opal, Gold, 18k Gold, Yellow Gold

Paraiba Tourmaline Boulder Opal 22k Yellow Gold Drop Earrings, Lola Brooks 2022
Located in Dallas, TX
things by hand, the award-winning maker often implements hand-selected untreated sapphires, tourmalines
Category

2010s American Artist Drop Earrings

Materials

Opal, Tourmaline, Paraiba, Multi-gemstone, 18k Gold, 22k Gold, Yellow Gold

  • 1
  • ...
Get Updated with New Arrivals
Save "Untreated Sapphire", and we’ll notify you when there are new listings in this category.

Untreated Sapphire For Sale on 1stDibs

Surely you’ll find the exact untreated sapphire you’re seeking on 1stDibs — we’ve got a vast assortment for sale. Every item for sale was constructed with extraordinary care, often using Gold, 18k Gold and Platinum. In our selection of items, you can find a vintage example as well as a contemporary version. You’re likely to find the perfect untreated sapphire among the distinctive items we have available, which includes versions made as long ago as the 19th Century as well as those produced as recently as the 21st Century. For this particular piece, 1.5 Carat and 2 Carat are consistently popular carat weights. Finding an appealing untreated sapphire — no matter the origin — is easy, but Fine Jewels UK, Emeralds Maravellous and Emilio! each produced a popular version that is worth a look. Today, if you’re looking for an oval cut version of this piece and are unable to find the perfect match, our selection also includes pear cut and cushion cut alternatives. Most of our untreated sapphire for sale are for women, but there are 73 pieces available to browse for men.

How Much is a Untreated Sapphire?

The price for an untreated sapphire starts at $311 and tops out at $6,500,000 with these rings, on average, selling for $3,520.

The Legacy of Sapphire in Jewelry Design

On 1stDibs, shop the bright blue gems that star in sapphire rings, sapphire necklaces and other vintage and antique sapphire jewelry

Sapphires — the stone of choice for Napoleon, Princess Diana and Elizabeth Taylor — have been a favorite of aristocrats and the well-to-do since the time of the Ancient Greeks.

Picture a sapphire. If the stone you conjure is a deep cornflower blue, you’re seeing only part of the picture. Although blue Kashmirs are considered the most valuable, sapphires come in every color except red. No matter the hue, this very special gem is rich in history and beloved by royals (FYI, Princess Diana and Kate Middleton share an 11-carat sapphire engagement ring), so September babies are in very noble company.

America’s version of royalty — old money and celebrities — have also shown a predilection for the blue stones. In 1940, John D. Rockefeller Jr. had Cartier mount a 62-carat sapphire he had bought from an Indian maharajah in a brooch for his first wife, Abby Aldrich Rockefeller; in 2001, the piece sold for a then-record of $3,031,000 at Christie’s New York.

The grand dame of jewelry, Elizabeth Taylor had a passion for the gems that her lovers were happy to indulge. Second husband Michael Wilding gave her an engagement ring set with a cabochon sapphire, while Richard Burton famously presented her with a BVLGARI sautoir set with diamonds and sapphires, including at its center a cabochon Burmese weighing 52.72 carats. One of the star lots in the sale of Taylor’s jewels at the Christie’s New York in 2011, it sold for $5,906,500.

You don’t have to have blue blood or a bulging bank account, however, to get an eyeful of this much-coveted gem. A number of outstanding examples reside in public collections.

The Smithsonian Museum of Natural History owns the 423-carat Logan sapphire, a gift from the Guggenheim family, and the Hall sapphire and diamond necklace, designed by Harry Winston and featuring 36 fine, well-matched cushion-cut Sri Lankan sapphires weighing a combined 195 carats. Also in the collection is the Bismarck sapphire necklace, designed by Cartier and sporting a central sapphire weighing 98.6 carats, which Mona Von Bismarck donated to the museum.

Sapphires are composed of corundum. Their color derives from trace elements, such as iron, titanium, chromium, copper or magnesium. When the trace element produces a ruby hue, the stone is called, what else, a ruby. (which is, as mentioned above, why sapphires cannot be red by definition).

The allure of large gemstones endures throughout the periods characterized as vintage, and sapphire features frequently in vintage engagement rings. (On 1stDibs, a range of buying guides can be found for those in the market for antique engagement ringsvintage engagement rings or Art Deco engagement rings.)  

Find an exquisite collection of vintage and antique sapphire jewelry on 1stDibs.