Skip to main content

Opal Doublet Pendant

3
to
8
80
8
145
118
17
6
4
3
2
1
1
54
15
2
2
2
Sort By
Vintage 14K Yellow Gold Opal Doublet Pendant # 15407
Located in Washington Depot, CT
Vintage 14 Karat Yellow Gold and Opal Doublet Pendant JAGi Certified- This elegant pendant
Category

Late 20th Century Pendant Necklaces

Materials

Opal, Black Opal, 14k Gold, 18k Gold, Yellow Gold

Australian 1.13 Opal Doublet Pendant Necklace in 18k White Gold
By Renata Bernard
Located in Sydney, AU
The ‘Elita’ opal doublet pendant (1.13ct) masterfully set in 18K white gold and framed by a set of
Category

2010s Australian Contemporary Pendant Necklaces

Materials

Opal, White Gold

Australian 0.48ct Opal Doublet Pendant 18K Yellow Gold with Diamonds
By Renata Bernard
Located in Sydney, AU
Bold and undeniably grandiose, the ‘Valeria’ opal doublet pendant (0.48 ct) is a piece intended to
Category

2010s Australian Contemporary Pendant Necklaces

Materials

Diamond, Opal, 18k Gold, Yellow Gold

Australian 3.20ct Opal Doublet Pendant Necklace 18 Karat Yellow Gold
By Renata Bernard
Located in Sydney, AU
The ‘Eye of Providence’ opal doublet pendant (3.20ct), a stunning piece symbolising benevolence and
Category

2010s Australian Contemporary Pendant Necklaces

Materials

Diamond, Opal, 18k Gold, Yellow Gold

Precious Australian 3.43ct Opal Doublet Pendant Butterfly 18K Yellow Gold
By Renata Bernard
Located in Sydney, AU
For the carefree and unencumbered, the exotic ‘Bindi’ opal doublet necklace (3.43ct) set in 18K
Category

2010s Australian Contemporary Pendant Necklaces

Materials

Opal, Yellow Gold

Australian 4.86ct Premium Quality Opal Doublet Pendant in 18k Yellow Gold
By Renata Bernard
Located in Sydney, AU
Simple but stunning is the ‘Greta’ pendant featuring a superb opal doublet (4.86ct) from Coober
Category

2010s Australian Contemporary Pendant Necklaces

Materials

Opal, Yellow Gold

Australian 1.40ct Premium Quality Opal Doublet Pendant in 18K Yellow Gold
Located in Sydney, AU
"Angelina" opal pendant features an alluring opal doublet (1.40ct) sourced from Coober Pedy
Category

2010s Australian Contemporary Pendant Necklaces

Materials

Opal, 18k Gold, Yellow Gold

Premium Quality Australian 9.50ct Opal Doublet Pendant in 18K Yellow Gold
By Renata Bernard
Located in Sydney, AU
Simple but stunning is the 'Greta' pendant featuring a superb opal doublet (9.50ct) from Coober
Category

2010s Australian Contemporary Pendant Necklaces

Materials

Opal, 18k Gold, Yellow Gold

Australian 15.78ct Opal Doublet and Diamond Pendant Set in 18K White Gold
Located in Sydney, AU
"Patricia" is an opal doublet pendant (15.78ct) with an intensive blue and green play-of-colour
Category

2010s Australian Contemporary Pendant Necklaces

Materials

Diamond, Opal, 18k Gold, White Gold

Freeform Australian Opal Pendant One of a Kind Gold Necklace, Barbara Heinrich
By Barbara Heinrich
Located in Dallas, TX
featuring an extraordinary 2.88 carat Australian Opal Doublet Pendant bezel-set bordered with granulation
Category

2010s American Artisan Pendant Necklaces

Materials

Opal, Diamond, White Diamond, Multi-gemstone, Gold, 18k Gold, Yellow Gold

Yellow Gold Opal Solitaire Pendant - 14k Doublet
Located in Greensboro, NC
Metal Content: 14k Yellow Gold Stone Information Genuine Opal Cut: Doublet Stone Note
Category

21st Century and Contemporary Pendant Necklaces

Materials

Opal, 14k Gold, Yellow Gold

Yellow Gold Opal Solitaire Pendant - 14k Doublet
Located in Greensboro, NC
Metal Content: 14k Yellow Gold Stone Information Natural Opal Cut: Doublet Origin: Australia
Category

21st Century and Contemporary Pendant Necklaces

Materials

Opal, 14k Gold, Yellow Gold

White Gold Opal & Diamond Pendant - 14k Doublet
Located in Greensboro, NC
Metal Content: 14k White Gold Stone Information Natural Opal Cut: Doublet Stone Note: (Australian
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Opal, 14k Gold, White Gold

Doublet Black Opal Yellow Gold Pendant Bright Polychrome Dark Blue
Located in Berlin, DE
18K yellow gold pendant with natural doublet black Opal opal origin - Australia opal measurements
Category

2010s French Artisan Pendant Necklaces

Materials

Opal, Black Opal, Gold, 18k Gold, Yellow Gold

Doublet Black Opal Yellow Gold Pendant Bright Polychrome Dark Blue
Doublet Black Opal Yellow Gold Pendant Bright Polychrome Dark Blue
Free Shipping
H 1.54 in W 0.31 in D 0.16 in L 1.14 in
Minimalist Doublet Opal Diamond Pendant Necklace 14k Yellow Gold
Located in Suwanee, GA
Minimalist Oval Shaped Australian Doublet Opal Diamond Pendant Necklace 14k Yellow Gold. Free
Category

2010s American Arts and Crafts Pendant Necklaces

Materials

Diamond, Opal, 14k Gold, Yellow Gold

Geometric Oval Shaped Australian Doublet Opal Pendant 14k Yellow Gold
Located in Suwanee, GA
Geometric Oval Shaped Australian Doublet Opal Pendant 14k Yellow Gold. Free Domestic USPS First
Category

2010s American Arts and Crafts Pendant Necklaces

Materials

Opal, 14k Gold, Yellow Gold

Minimalist Square Australian Doublet Opal Pendant Necklace 14K Yellow Gold
Located in Suwanee, GA
Minimalist Square Australian Doublet Opal Pendant Necklace 14K Yellow Gold. Free Domestic USPS
Category

2010s American Arts and Crafts Pendant Necklaces

Materials

Opal, 14k Gold, Yellow Gold

Geometric Triangle Shaped Australian Doublet Opal Pendant 14k Yellow Gold
Located in Suwanee, GA
Geometric Triangle Shaped Australian Doublet Opal Pendant 14k Yellow Gold. Free Domestic USPS
Category

2010s American Arts and Crafts Pendant Necklaces

Materials

Opal, 14k Gold, Yellow Gold

Geometric Square Shaped Australian Doublet Opal Pendant 14k Yellow Gold
Located in Suwanee, GA
Geometric Square Shaped Australian Doublet Opal Pendant 14k Yellow Gold. Free Domestic USPS First
Category

2010s American Arts and Crafts Pendant Necklaces

Materials

Opal, 14k Gold, Yellow Gold

Oval Australian Doublet Opal & Diamond Pendant Necklace 14k Yellow Gold
Located in Suwanee, GA
Minimalist Oval Australian Doublet Opal & Diamond Pendant Necklace 14k Yellow Gold. Free Domestic
Category

2010s American Arts and Crafts Pendant Necklaces

Materials

Diamond, Opal, 14k Gold, Yellow Gold

Adorable Dog Australian Doublet Opal, Diamond, Sapphire Pendant Necklace 18K
Located in Suwanee, GA
Adorable Dog Australian Doublet Opal, Diamond, Sapphire Pendant Necklace 18K Yellow Gold. Free
Category

2010s American Artist Pendant Necklaces

Materials

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

Pear Shaped Australian Doublet Opal Diamond Pendant Necklace 14k Yellow Gold
Located in Suwanee, GA
Pear Shaped Australian Doublet Opal Diamond Pendant Necklace 14k Yellow Gold. Free Domestic USPS
Category

2010s American Arts and Crafts Pendant Necklaces

Materials

Diamond, Opal, Yellow Gold, 14k Gold

Geometric Art Hexagon Australian Doublet Opal Pendant Necklace 14k Yellow Gold
Located in Suwanee, GA
Minimalist Geometric Pattern Hexagon Australian Doublet Opal Pendant Necklace 14k Yellow Gold
Category

2010s American Arts and Crafts Pendant Necklaces

Materials

Opal, 14k Gold, Yellow Gold

Heart Shaped Australian Doublet Opal Diamond Pendant Necklace 14k Yellow Gold
Located in Suwanee, GA
Minimalist Heart-Shaped Australian Doublet Opal Diamond Pendant Necklace 14k Yellow Gold. Free
Category

2010s American Arts and Crafts Pendant Necklaces

Materials

Diamond, Opal, 14k Gold, Yellow Gold

Earth Moon Design Doublet Opal & Diamond Pendant Necklace 18K Rose Gold
Located in Suwanee, GA
Earth-Moon Design Australian Doublet Opal & Diamond 18K Rose Gold Pendant Necklace.  Also
Category

2010s American Arts and Crafts Pendant Necklaces

Materials

Diamond, Opal, 18k Gold, Rose Gold

Earth Moon Design Doublet Opal & Diamond Pendant Necklace 18K Yellow Gold
Located in Suwanee, GA
Earth-Moon Design Australian Doublet Opal & Diamond 18K Yellow Gold Pendant Necklace.  Also
Category

2010s American Arts and Crafts Pendant Necklaces

Materials

Diamond, Opal, 18k Gold, Yellow Gold

Crab Doublet Opal & Diamond 18K Yellow Gold Cancer Zodiac Pendant Necklace
Located in Suwanee, GA
Adorable Crab Australian Doublet Opal & Diamond Eyes 18K Yellow Gold Cancer Zodiac Pendant Necklace
Category

2010s American Arts and Crafts Pendant Necklaces

Materials

Diamond, Opal, 18k Gold, Yellow Gold

Premium Quality Australian 9.50ct Black Doublet Opal Pendant in 18K White Gold
By Renata Bernard
Located in Sydney, AU
Behold the exquisite ‘Jessica’ opal pendant, adorned with a captivating opal doublet-black (9.50ct
Category

2010s Australian Contemporary Pendant Necklaces

Materials

Diamond, Opal, 18k Gold, White Gold

Premium Quality Australian 10.93ct Black Doublet Opal Pendant in 18K Yellow Gold
By Renata Bernard
Located in Sydney, AU
Incredibly unique and elegant, the ‘Alice’ opal pendant features a one-of-a-kind Australian black
Category

2010s Australian Contemporary Pendant Necklaces

Materials

Diamond, Opal, 18k Gold, Yellow Gold

Round Shaped Australian Doublet Opal Halo Diamond Pendant Necklace 14k Yellow Go
Located in Suwanee, GA
Round Shaped Australian Doublet Opal Halo Diamond Pendant Necklace 14k Yellow Gold. Free Domestic
Category

2010s American Arts and Crafts Pendant Necklaces

Materials

Diamond, Opal, 14k Gold, Yellow Gold

Two-Side Australian Doublet Opal & Malachite Round Pendant Necklace 14K Yellow G
Located in Suwanee, GA
Two-Side Australian Doublet Opal & Malachite Round Pendant Necklace 14K Yellow Gold. Free
Category

2010s American Arts and Crafts Pendant Necklaces

Materials

Malachite, Opal, 14k Gold, Yellow Gold

Yellow Gold Black Opal Doublet and Diamond Pendant, 14 Karat Round Brilliant Cut
Located in Greensboro, NC
Metal Content: 14k Yellow Gold Stone Information: Genuine Black Opal Doublet Natural Diamond
Category

20th Century Unknown Pendant Necklaces

Materials

Diamond, Opal, 14k Gold, Yellow Gold

Athena Doublet Opal Gold 18k Necklace
By Nina Wynn
Located in Denver, CO
Details Metal: 18K Yellow Gold Stone carat: 1.25 Diamond carat: 0.06 Length: Stone size: 7mm About the stones: Genuine Aquamarine: As the blue-green, highly prized variety of the mi...
Category

21st Century and Contemporary Vietnamese Contemporary Pendant Necklaces

You Are in My Heart - Australian Doublet Opal Pink Sapphire Pendant 18K Rose Gol
Located in Suwanee, GA
Australian Doublet Opal Pink Sapphire Pendant Necklace 18K Rose Gold.  Design name: You Are in My
Category

2010s American Arts and Crafts Pendant Necklaces

Materials

Opal, Pink Sapphire, 18k Gold, Rose Gold

Minimalist Oval Doublet Opal & Diamond Necklace 14k Yellow Gold
Located in Suwanee, GA
Minimalist Oval Australian Doublet Opal & Diamond Pendant Necklace 14k Yellow Gold. Free Domestic
Category

2010s American Arts and Crafts Pendant Necklaces

Materials

Diamond, Opal, Yellow Gold, 14k Gold

Geometric Pattern Rectangle Australian Doublet Opal Necklace 14k Yellow Gold
Located in Suwanee, GA
Minimalist Geometric Pattern Rectangle Australian Doublet Opal Pendant Necklace 14k Yellow Gold
Category

2010s American Arts and Crafts Pendant Necklaces

Materials

Opal, 14k Gold, Yellow Gold

Australian 0.47ct Opal Doublet Necklace in 18K White Gold with Diamonds
By Renata Bernard
Located in Sydney, AU
"Bella" is doublet opal in an 18K white gold pendant. Opal is the queen of gems, renowned for its
Category

2010s Australian Contemporary Pendant Necklaces

Materials

Diamond, Opal, 18k Gold, White Gold

Australian 6.79ct Opal Doublet and Diamond Necklace in 18K White Gold
Located in Sydney, AU
"Eve" opal pendant features a stunning opal doublet (6.79ct) with its unique play-of-colour with
Category

2010s Australian Contemporary Pendant Necklaces

Materials

Diamond, Opal, 18k Gold, White Gold

18K Yellow Gold Necklace with Blue Opal Doublet and Diamonds by Ruth Greico
Located in Virginia Beach, VA
Grieco. This exceptional piece features a captivating 5.20-carat blue opal doublet, a gemstone renowned
Category

21st Century and Contemporary Brazilian Modern Pendant Necklaces

Materials

Diamond, Opal, 18k Gold

Two-Side Australian Doublet Opal & Mother of Pearl Necklace 18K Yellow Gold
Located in Suwanee, GA
Two-Side Australian Doublet Opal & Mother of Pearl Pendant Necklace 18K Yellow Gold. . Free
Category

2010s American Arts and Crafts Pendant Necklaces

Materials

Opal, Pearl, 18k Gold, Yellow Gold

Australian Opal & Diamond Pendant Certified
Located in Southbury, CT
, this gorgeous pendant features a 15.54mm x 12.26mm x 2.60mm opal from Australia. This is not a doublet
Category

Mid-20th Century Artisan Pendant Necklaces

Materials

Diamond, Opal

Australian Opal & Diamond Pendant Certified
Australian Opal & Diamond Pendant Certified
Free Shipping
W 0.72 in L 1.18 in
Nina Nguyen Opal Doublet Pear 18 Karat Gold Necklace Bezel-Set
By Nina Wynn
Located in Denver, CO
With its single, bezel-set opal doublet, the diamond-accented Lilly Gold Necklace is clean and
Category

21st Century and Contemporary Vietnamese Contemporary Pendant Necklaces

Opal, Diamond & Emerald Pendant Necklace, Genuine Black Opal, 14K Yellow Gold
By Five Star Jewelry
Located in Austin, TX
These stunningly beautiful black opal doublets are set in polished 14k yellow gold prongs that are
Category

2010s American Contemporary Pendant Necklaces

Materials

Black Opal, Opal, Emerald, Diamond, Yellow Gold, 14k Gold

Opal Diamond Necklace, Black Opal 3 Station Pendant, 14 Karat Gold Drop Necklace
By Five Star Jewelry
Located in Austin, TX
These stunningly beautiful black opal doublets set in polished 14k yellow gold and dripping with
Category

2010s American Modern Pendant Necklaces

Materials

Diamond, Opal, 14k Gold, Yellow Gold, Gold

14K Yellow Gold Australian Opal & Diamond Pendant .75tdw, 11g
Located in Laguna Beach, CA
pendant necklace. Stamped 14k and weighs 11 grams gross weight. The opal is solid piece not a doublet
Category

20th Century Unknown Pendant Necklaces

Materials

Diamond, Opal, 14k Gold, Yellow Gold

Australian Opal and Diamond Castle Pendant 18k Gold R4284
Located in Osprey, FL
♥ Solid 18k yellow gold castle pendant set with a beautiful doublet Australian Opal and diamonds ♥
Category

2010s American Pendant Necklaces

Materials

Diamond, Opal, Gold, 18k Gold

Peter Suchy Oval Australian Boulder Opal Yellow Gold Pendant Necklace
By Peter Suchy
Located in Stamford, CT
Opal pendant necklace. Natural oval free form Australian boulder opal on rock matrix (not a doublet
Category

21st Century and Contemporary Pendant Necklaces

Materials

Opal, Gold, 14k Gold, Yellow Gold

Natural 3.55ct Australian Opal Pear Cabochon 18k Yellow Gold Pendant Necklace
By Gems and Jewels UK
Located in Birmingham, GB
Natural Australian Cooper Pedy White Opal 18k Yellow Gold Solitaire Pendant Necklace. 3.55 Carat
Category

21st Century and Contemporary Pendant Necklaces

Materials

Opal, Gold, 18k Gold, Yellow Gold

Michael Kneebone Opal Topaz Aquamarine Sapphire Diamond Confetti Pendant
By Michael Kneebone
Located in Austin, TX
" pendant. "Boulder opal" refers to opal that has formed within the ironstone matrix. It is not to be
Category

2010s American Contemporary Pendant Necklaces

Materials

Sapphire, Diamond, Topaz, Blue Sapphire, Opal, White Diamond, Aquamarine...

Premium Quality Australian 8.65ct Opal Pendant Crafted in 18K Yellow Gold
By Renata Bernard
Located in Sydney, AU
Elegant and sophisticated, the ‘Isabella’ opal doublet-black pendant showcases a radiant rainbow
Category

2010s Australian Contemporary Pendant Necklaces

Materials

Opal, 18k Gold, Yellow Gold

Australian Opal and Diamond Castle Convertible Ring Pendant Charm 18k Gold
Located in Osprey, FL
♥ Solid 18k yellow gold castle pendant set with a beautiful doublet Australian Opal, diamonds, and
Category

2010s American Pendant Necklaces

Materials

Diamond, Opal, Gold, 18k Gold

GIA Opal Vintage Pendant 14K Gold Australian Natural Huge Solid Rainbow 6.64 Cts
Located in Sylvania, GA
Paperwork is Included. Huge Natural Opal Is Solid...Not a doublet. NOTE SIZE : Huge Luxury Pendant 41.5
Category

Late 20th Century Pendant Necklaces

Materials

Diamond, Opal, Black Opal, Gold, 14k Gold

GIA Black Opal Vintage Pendant 14K Australian Natural Rainbow Huge Fine 5.53 CTS
Located in Sylvania, GA
Opal Is Solid Boulder Opal--Not a doublet. NOTE SIZE: Huge Luxury Pendant 34 MM long x 27.5 MM wide
Category

Late 20th Century Pendant Necklaces

Materials

Diamond, Opal, Black Opal, Gold, 14k Gold

Galaxy of Light (Australian Opal, 10K Yellow Gold Pendant) by Ken Fury
By Ken Fury
Located in Queens, NY
with a Genuine Australian Opal doublet. Overall size: 15 mm x 9 mm Hand-signed
Category

2010s American Contemporary Pendant Necklaces

Materials

Opal, 10k Gold, Yellow Gold

GIA Australian Opal Diamond Vintage 14K Pendant Solid Rainbow Huge 20.88 Carats!
Located in Sylvania, GA
VINTAGE 14K PENDANT & BOX! FINE EARTH-MINED HUGE 19.28 CARAT AUSTRALIAN SOLID OPAL, FROM AUSTRALIA
Category

20th Century Pendant Necklaces

Materials

Diamond, Opal, Gold, 14k Gold

3.01 Cts Au Opal, Pink Sapphire & Diamond Pendant, Impressive Play of Colors
Located in Hong Kong, HK
Please check out the HD video! This is an Australian doublet Opal! When it comes to opals, one of
Category

2010s Hong Kong Pendant Necklaces

Materials

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

Retro c1960's Australian Oval Opal 9K Yellow Gold Pendant on Matching Gold Chain
Located in MELBOURNE, AU
, measuring 26mm (including bail) x 14mm bezel set with Australian doublet opal of oval shape, of 14mm x
Category

Vintage 1960s Australian Retro Pendant Necklaces

Materials

Opal, Yellow Gold, 9k Gold

Lauren Harper Boulder Opal, Diamond, Gold Statement Necklace
By Lauren Harper
Located in Winnetka, IL
Vibrant blue Boulder Opal doublets are surrounded by 18kt Yellow gold and Diamonds in feminine and
Category

2010s Unknown Artist Pendant Necklaces

Materials

Diamond, Opal, 18k Gold

Lauren Harper Boulder Opal, Diamond, Gold Statement Necklace
Lauren Harper Boulder Opal, Diamond, Gold Statement Necklace
Free Shipping
W 1.26 in D 0.12 in L 3.98 in
Nina Nguyen White Opal Pear 18 Karat Gold Necklace Bezel-Set
By Nina Wynn
Located in Denver, CO
boulders. - Opal Doublet which is a thin slice of precious opal cemented onto a backing, usually a piece of
Category

21st Century and Contemporary Vietnamese Contemporary Pendant Necklaces

Materials

Diamond, Opal, 18k Gold

Pinnacle Medium Boulder Opal Silver Necklace
By Nina Wynn
Located in Denver, CO
pinnacle boulder opal pendant, the Pinnacle Medium Boulder Opal Silver Necklace is bold and brilliant, a
Category

21st Century and Contemporary Vietnamese Contemporary Pendant Necklaces

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

Opal Doublet Pendant For Sale on 1stDibs

You are likely to find exactly the opal doublet pendant you’re looking for on 1stDibs, as there is a broad range for sale. Each design created in this style — which was crafted with great care and often made from Gold, 18k Gold and Yellow Gold — can elevate any look. You can easily find a 7 antique edition and 51 modern creations to choose from as well. You’re likely to find the perfect opal doublet pendant among the distinctive items we have available, which includes versions made as long ago as the 20th Century as well as those produced as recently as the 21st Century. Finding an appealing opal doublet pendant — no matter the origin — is easy, but Renata Bernard, Nina Nguyen Designs and Alexey Gabilo each produced a popular version that is worth a look. A cabochon version of this piece has appeal, but there are also oval cut and round cut versions for sale. Finding an opal doublet pendant for sale for women should be easy, but there are 11 pieces available to browse for unisex as well as men, too.

How Much is a Opal Doublet Pendant?

The price for an opal doublet pendant starts at $385 and tops out at $10,375 with these necklaces, on average, selling for $1,278.

Finding the Right pendant-necklaces for You

Whether you’re layering multiple jewelry pieces or opting for a single strand, vintage pendant necklaces are versatile accessories that can elevate your casual wear as easily as they can add a creative flourish to your formal attire.

The earliest jewelry was less about accessorizing than it was about wearers arming themselves with amulets. In Ancient Egypt, some amulets featured a loop so that they could be strung around one’s neck. While rubies have long been one of the few gemstones that can give diamonds a run for their money, members of some ancient civilizations valued the stones from the get-go, donning ruby pendants as well as other stones with the belief that these adornments would bring protection, healing powers or strength. Today, we still wear our charm bracelets and charm pendants around our necks for good luck.

Later, pendant necklaces, like most fine jewelry, were worn strictly by royalty or the upper class and conferred wealth and prestige. This changed over time, thankfully, as wearing jewelry became more widespread, a democratized means of personal expression.

During the 18th and 19th centuries, pendant necklaces evolved from their status as spiritual amulets, but the jewels still carried deep personal significance. Victorian pendants, in particular, were part of the “mourning jewelry” tradition. Wearers would embed their pendants with locks of hair from a deceased loved one as a way of grieving in the wake of a loss. In the case of cameo jewelry, some pendants were even decorated with miniature hand-carved portraits in a detailed raised relief. Today, portraiture is still a characteristic of many of the hand-carved pendant necklaces offered by Italian jewelry house Scala Gioielli.

Luxury fine jewelry brands such as Cartier, BVLGARI and David Yurman offer their own unique interpretations of the cherished accessory, embellishing platinum or gold pendant necklaces with diamonds, sapphires and other stones.

On 1stDibs, find an extraordinary range of vintage pendant necklaces and other necklaces today.