Unisex Band Rings
to
1,397
6,590
2,611
2,429
3,756
1,536
5,598
916
415
577
1,014
3
3.25
3.5
3.75
4
4.25
4.5
4.75
5
5.25
5.5
5.75
6
6.25
6.5
6.75
7
7.25
7.5
7.75
45
147
1,569
6,132
58
33
77
51
37
78
69
87
161
233
16
11,182
7,894
360
3050
740
475
335
330
to
286
258
162
134
131
1,976
1,525
395
189
137
125
118
107
62
60
21
10
10
9
4
2
2
7,766
128
5,574
1,894
Gender: Unisex
18kt White Gold Multicolor Sapphire Band Ring
Located in Bethesda, MD
18kt white gold multicolor sapphire band measuring size 6 ½. 20 marquise cut sapphires approximately 8cts in total with a full spectrum of all colors of sapphires can come in. The b...
Category
1990s English Band Rings
Materials
Sapphire, 18k Gold, White Gold
Boucheron Diamond Double Band Ring, Signed
Numbered, 18K White Gold
By Boucheron
Located in MONTMORENCY, FR
Signed Boucheron double-band diamond ring in 18K white gold, numbered and hallmarked. This refined design presents two closely matched pavé rows separated by a polished channel, prod...
Category
21st Century and Contemporary French Band Rings
Materials
Diamond, 18k Gold, White Gold
Emilio Jewelry GIA Certified 15.32 Carat Emerald Cut Diamond Eternity Band
By Emilio!
Located in New York, NY
1.00ct each all Gia
D-F
Vvs1-Vs1
15.32ct
From Emilio Jewelry, a well known and respected wholesaler/dealer located on New York’s iconic Fifth Avenue,
Each diamond is Gia certifie...
Category
21st Century and Contemporary Band Rings
Materials
Diamond, Emerald
Cartier Paris 1960
s 2.88 CTW Diamond 18K Gold Vintage Rolling Trinity Band Ring
By Cartier
Located in Philadelphia, PA
Designed as three interlocking yellow gold bands bead set with diamonds fully around
Weighing approximately 2.88 carats total - G color with VS1 clarity
Bands feature "rolling" movem...
Category
Vintage 1960s Modern Band Rings
Materials
Diamond, Gold, 18k Gold, Yellow Gold
Platinum Petite Carole Micro-Prong Diamond Ring
1/6 Ct. Tw
Located in San Francisco, CA
From our signature Micro-Prong wedding band collection, this Petite ring features perfectly matched round brilliant diamonds throughout 75% of the shank. Experience the Difference!
...
Category
21st Century and Contemporary American Band Rings
Materials
Diamond, Platinum
$891 Sale Price / item
20% Off
Alex Jona 18 Karat Yellow Gold Geometric Open Band Ring
By Alex Jona
Located in Torino, Piedmont
Alex Jona design collection, hand crafted in Italy, 18 karat yellow gold geometric open ring band. US 6 -EU 12, can be made to order in all sizes and gold color.
Dimensions: H 0.80 i...
Category
21st Century and Contemporary Italian Band Rings
Materials
18k Gold, Yellow Gold
18 Karat Rose Gold Diamond Domed Cocktail Dinner Ring
By Avanti
Located in Carrollton, TX
This gorgeous 18k rose gold ring was inspired from the concave shaped shells and waves of the ocean. With over 4.24 cts of round brilliant diamonds, this masterpiece will be the wea...
Category
2010s American Contemporary Band Rings
Materials
Diamond, 18k Gold, Rose Gold
Antique Victorian Rosey Yellow Gold Classic Polished 5.49mm Wide Band Ring
Located in Montclair, NJ
Material: 15k Rosy Yellow Gold
Weight: 5.70 Grams
Ring Size: 7.5 (Fitted on a finger, please contact us prior to purchase for sizing inquires.)
Ring Width: 5.49mm (0.21") (north to ...
Category
21st Century and Contemporary Victorian Band Rings
Materials
Gold, Yellow Gold
Cartier Juste un Clou Diamond 18K White Gold Ring Size 51
By Cartier
Located in Banbury, GB
SKU 33301769
Comes With Full Set (Box + Card)
Date 2013
RRP £4,550 Incl. VAT / €5,300 Incl. VAT / $5,400 Excl. Taxes
Model B4092751
Serial Number VH****
Metal 18k White Gold
Stones D...
Category
2010s French Band Rings
Materials
Diamond, Gold, 18k Gold, White Gold
20th Century Yellow Jade Stone Archers Ring
Located in London, GB
Mottled Yellow Jade Stone
20th Century Archers Ring
Dated 1970s
Thick heavy piece - worn on the thumb
or as a decorative interior addition
The design orig...
Category
Late 20th Century Chinese Artisan Band Rings
Materials
Jade
Sterling Silver Angela Cummings Wide Ring Size US 6
Located in New York, NY
Sterling silver wide textured ring by Angela Cummings. 0.75" width.
Category
21st Century and Contemporary American Band Rings
Materials
Sterling Silver
David Yurman Eden Single Row Diamond Full Pavé Eternity Band Ring in Platinum
By David Yurman
Located in San Diego, CA
DAVID YURMAN EDEN Single Row Eternity Diamond Wedding Band
In this streamlined band, sculptural metal and discreet Cable detailing create a sensuou...
Category
2010s American Band Rings
Materials
Diamond, Platinum
0.25ctw Diamond Wedding Band 18k Yellow Gold Size 7 Ring Stackable COA
Located in McLeansville, NC
This Tomas Rae ring comes with a certificate of authenticity
Gemstone Information:
- Natural Diamonds -
Total Carats - 0.25ctw
Cut - Round Brilliant
Color - L - M
Clarity - SI1 -...
Category
21st Century and Contemporary Band Rings
Materials
Diamond, 18k Gold, Yellow Gold
Tiffany
Co. Atlas Collection Open 18 Karat White Gold Band Ring with Diamonds
By Tiffany
Co.
Located in Scottsdale, AZ
Ring size: 5.5
Sophisticated and stunning Tiffany & Co. Atlas Collection band ring with diamonds. Founded in 1837 in New York City, Tiffany & Co. is one of the world's most storied ...
Category
21st Century and Contemporary Italian Contemporary Band Rings
Materials
Diamond, Gold, 18k Gold, White Gold
Diamond Five-Stone Ring in Yellow Gold
Located in New York, NY
Diamond Five-Stone Ring In Yellow Gold Hand Crafted In 14k Yellow Gold.
The details are as follows :
Diamond Weight : 0.35 carat ( GH color and VS clarity ) 7pts each
Ring Size : ...
Category
2010s American Contemporary Band Rings
Materials
Diamond, Yellow Gold
Old Euro Diamond Shared Prong Eternity Band (Approx. 1.50-Carats), Platinum
Located in New York, NY
This elegant eternity band showcases a continuous row of old European cut diamonds, each meticulously set in a classic shared prong setting. The diamonds, with a total weight of appr...
Category
2010s Unknown Art Deco Band Rings
Materials
Diamond, Platinum
Bulgari 18 K White Gold Parentesi Band Ring
By Bulgari
Located in Zurich, Zollstrasse
18 K white Gold bracket Ring from the Parentesi Collection.
18k white Gold Parentesi band ring by Bulgari. Ring size 14/54 (US ring size 7), the ring is ...
Category
Vintage 1980s Italian Contemporary Band Rings
Materials
18k Gold, White Gold
Vintage Triple Cabochon Coral 14K Gold Band Ring
Located in Rotterdam, NL
A vintage triple coral stone set in a gold band ring. The three stones are round shaped cabochons surrounded by a 14 karat yellow gold frame and bezel set. Coral is considered a symb...
Category
Mid-20th Century Dutch Band Rings
Materials
Coral, 14k Gold, Yellow Gold
18K Yellow Gold and Round Brilliant Cut Diamonds Textured Ring
Located in Virginia Beach, VA
Radiant in the rich light of 18k yellow gold, this ring embodies a contemporary elegance infused with organic character. The band flows with sculptural, textured forms, each curve an...
Category
2010s American Contemporary Band Rings
Materials
Diamond, Yellow Gold
Vintage Bamboo Pattern 6mm Gold Dome Band Ring
Located in Montreal, QC
Simply Beautiful! Vintage Bamboo Pattern 6mm Hollow Dome Ring. Hand crafted in 18K Rose Gold. Ring size 6, we offer ring resizing. The ring epitomizes vintage charm. Ideal worn alone...
Category
Late 20th Century Modernist Band Rings
Materials
Gold, 18k Gold, Rose Gold
Natural Diamond Ring 3.60 cts 18 KT Yellow Gold Full Eternity Rind
Located in Antwerpen, BE
Behold the exquisite craftsmanship of this remarkable ring, where sophistication meets brilliance in perfect harmony. An elegant procession of baguette diamonds, totaling 3.60 carats...
Category
2010s Belgian Modern Band Rings
Materials
Diamond, 18k Gold, Yellow Gold
$7,992 Sale Price
20% Off
Sapphire and Diamond 14k White Gold Stackable Band/Ring
Located in Derby, NY
Expertly crafted and elegant, our Sapphire and Diamond 14k White Gold Band/Ring features intricate engraved detail on the top and bottom, a delicate milgrain edge, and sparkling, vib...
Category
20th Century Band Rings
Materials
Diamond, Sapphire, 14k Gold, White Gold
Cartier Lanieres 18K Yellow Gold Diamond and Pink Sapphire Ring
By Cartier
Located in Braintree, GB
Cartier Lanieres 18K Yellow Gold Diamond and Pink Sapphire Ring.
A striking and contemporary wide band ring by Cartier from the celebrated Lanieres collection, crafted in 18-karat ...
Category
Early 2000s French Band Rings
Materials
Diamond, Pink Sapphire, 18k Gold, Yellow Gold
0.2Ct Diamond
0.2Ct Emerald in 18K Yellow Gold Wedding Band 1981 Classic Ring
Located in Paramus, NJ
Diamonds and Emeralds: Seven meticulously selected round diamonds and seven round emeralds grace this wedding ring, each securely set in a classic prong setting. The total carat weig...
Category
21st Century and Contemporary Hong Kong Modern Band Rings
Materials
Diamond, Emerald, Yellow Gold, 18k Gold
Art Deco Old Mine Cut Diamond and 15 Carat Gold Solitaire Band
Located in Chipping Campden, GB
This Old Mine cut diamond solitaire is simply stunning. The old mine cut diamond measures approx 50pts and is H colour VS1. Modelled in 15 carat gold.
Ring Size: T 1/2 or 9 3/4
Fa...
Category
Vintage 1910s British Art Deco Solitaire Rings
Materials
Diamond, Gold
Victorian Wedding Ring Band Antique 14K Gold Dated January 14 1907 JR Woods
Located in Dearborn, MI
Genuine Original Antique from 1907 Victorian Wedding Band Vintage Antique 14K Yellow Gold
Over $350 in Gold Value Alone
Trademarked JR Woods
We Can Polish On Request
Inside Sha...
Category
Antique Early 1900s Victorian Band Rings
Materials
14k Gold, Yellow Gold
Vintage Rare Tiffany
Co. Payless Drug Stores Onyx Pinky Ring
By Tiffany
Co.
Located in Honolulu, HI
Item Specifications:
Brand: Tiffany & Co.
Metal: 14k Yellow Gold
Total Weight: 8.4 Grams
Size: 7.25
Condition: Vintage, Excellent
Stamped: "Payless Drug Stores" "14k 585" "Tiff...
Category
21st Century and Contemporary Band Rings
Materials
Onyx, Yellow Gold, 14k Gold
Platinum Baguette Diamond Eternity Band
Located in New York, NY
1.78ct TW of Baguette Diamonds in a Platinum Eternity Band.
Category
2010s American Modern Band Rings
Materials
Diamond, Platinum
$7,750 / item
Vintage Tiffany
Co. 18K Gold Crossover Citrine Cabochon Ring
By Tiffany
Co.
Located in Venice, CA
This stunning vintage Tiffany & Co. ring, which has a crossover element that centers around an oval citrine cabochon, creates what looks like an eye. The citrine is globelike, with a...
Category
20th Century American Modern Band Rings
Materials
Citrine, Gold, 18k Gold
Angel Skin Coral
Diamond Yellow Gold Circa 1970
Located in Carmel-by-the-Sea, CA
A stunning estate ring circa 1970, featuring fine "angel skin" coral and scintillating white diamonds. The ring is masterfully made, incorporating the finely cut pieces of coral with...
Category
Late 20th Century Band Rings
Materials
Coral, Diamond, 18k Gold, Yellow Gold
Wide Band Tri-Color Diamond Pave Ring 18K Gold Platinum 2ct Diamonds Statement
Located in Osprey, FL
Adorn your finger with our elegant 13mm Wide Diamond Band. Perfectly crafted with white diamonds and 18K yellow gold and platinum. This exquisite ring will leave you feeling like the...
Category
2010s American Band Rings
Materials
Diamond, 18k Gold, Platinum
Louis Vuitton Monogram Yellow Gold Cocktail Band Ring Sz 5
Located in Feasterville, PA
The intricate cut-out design provides a contrast between solid gold and negative space, allowing light to pass through the motifs. This gives the ring a lighter, almost ethereal qual...
Category
Early 2000s Band Rings
Materials
Yellow Gold
Trillion Diamond Yellow Gold Ring
Located in New York, NY
22K Yellow Gold Diamond Ring with Triangle Cut Diamond weighting 0.30ct, 8.89g
Category
2010s American Modernist Band Rings
Materials
Diamond, 22k Gold, Yellow Gold
Alex Jona Onda 18 Karat Yellow Gold Ring Band
By Alex Jona
Located in Torino, Piedmont
Alex Jona design collection, hand crafted in Italy, 18 karat yellow gold onda ring band.
Dimension: H 0.58 in X W 0.86 in - H 14.79 mm X W 22.06 mm
Alex Jona jewels stand out, not ...
Category
21st Century and Contemporary Italian Band Rings
Materials
18k Gold, Yellow Gold
Vintage 9 Carat Gold Decorative Band
Located in Chipping Campden, GB
The engraving on this 9ct gold band is gorgeous and the pattern includes a four point star. This band would make a gorgeous fancy wedding band or a beautiful every day wear ring. Hal...
Category
Vintage 1970s British Band Rings
Materials
Gold
Cartier White Gold Diamond C De Cartier Ring
By Cartier
Located in Mayfair, London, London
A beautiful vintage 18k white gold ring by Cartier from the C de Cartier collection. The openwork ring features 9 interlocking iconic C motifs, one pave set with 11 round brilliant c...
Category
21st Century and Contemporary Contemporary Band Rings
Materials
Diamond, White Gold
Retro Platinum
Diamond Eternity Wedding Band Ring
Located in Philadelphia, PA
A very fine vintage platinum and diamond eternity band ring.
With round brilliant diamonds prong set in a platinum band that is embellished with decorative engravings on the side of...
Category
20th Century Unknown Edwardian Wedding Rings
Materials
Diamond, Platinum
Hidalgo Gold Band Ring, 18k Yellow Gold, Ring Size 5.75, Rope Band Ring
By Hidalgo
Located in McLeansville, NC
This minimalist 14k white gold rope band ring is the perfect accessory for adding a touch of elegance to any outfit. Made with solid 14k white gold, this ring is both durable and hig...
Category
2010s Band Rings
Materials
18k Gold, Yellow Gold
Vintage Peridot and Diamond Ring in 18k Yellow Gold
Located in Honolulu, HI
Item Specifications:
Style: Statement ring
Metal: 18k Yellow Gold
Ring Weight: 4.90 grams
Ring Size: 7
Ring Height: 10.86 mm
Gemstone Specifications:
Gemstone: Peridot
Topaz ...
Category
21st Century and Contemporary Unknown Modern Band Rings
Materials
Diamond, Peridot, Yellow Gold, 18k Gold
Victorian Emerald and Diamond Five-Stone Ring
Located in London, GB
A Victorian emerald and diamond five-stone ring, alternately set with three square-set emeralds estimated to weigh a total of 2 carats, accompanied by GCS Report stating to be of Col...
Category
Antique 1880s British Victorian Engagement Rings
Materials
Diamond, Emerald, 18k Gold, Yellow Gold
Yianni Creations London Blue Topaz and White Diamond Fine Silver Wide Band Ring
Located in Astoria, NY
This Yianni Creations gorgeous band ring from our Ammos Collection is handmade from 950* purity of fine silver and created in our family workshop in Greece. It has a unique brushed t...
Category
21st Century and Contemporary Greek Contemporary Band Rings
Materials
Topaz, Diamond, White Diamond, Blue Topaz, Palladium, Silver, Sterling S...
NEW Mens 18K Yellow Gold 1.96ct GIA Old European Diamond 3 Stone Gypsy Band Ring
Located in Montclair, NJ
This sharp men's gypsy band ring is newly crafted in solid 18k yellow gold and features 3 very fine quality old diamonds neatly burnish flush set across its domed top. The center dia...
Category
2010s American Band Rings
Materials
Diamond, Yellow Gold
0.33ctw Diamond Wedding Band 14k White Gold Size 7 Anniversary Ring
Located in McLeansville, NC
Gemstone Information:
- Natural Diamonds -
Total Carats - 0.33ctw
Cut - Round Brilliant
Color - H - I
Clarity - SI2 - I1
Metal: 14k White Gold
Weight: 4 Grams
Stamps: 14k
Face Heig...
Category
21st Century and Contemporary Band Rings
Materials
Diamond, 14k Gold, White Gold
Ralph Masri Modernist Yellow Sapphire and Diamond Signet Ring
By Ralph Masri
Located in Barcelona, Barcelona
18kt yellow gold ring with yellow sapphires and diamonds from Ralph Masri's Modernist collection, inspired by mid-century Modernist architecture with an emphasis on minimalist shapes...
Category
21st Century and Contemporary Lebanese Modernist Band Rings
Materials
Diamond, Yellow Sapphire, 18k Gold
$2,700 Sale Price / item
27% Off
18k 750 White Gold 4 Ct Natural White Diamond Wide Band/Ring
Located in New York, NY
18K White Gold Natural Diamond Ring
Metal Type: 18K 750 White Gold
Total Item Weight: 9.2 Grams
Ring Size: 6 (Sizable)
1:
Natural Diamond Weight: 4.0 Ct.
Diamond Clarity Grade: SI-I...
Category
21st Century and Contemporary Contemporary Band Rings
Materials
Diamond, 18k Gold, White Gold
18 Karat Rose Gold Paper Cigar Ring with Diamonds by Allison Bryan
Located in London, GB
This classic textured wide cigar band ring crafted in solid 18-carat rose gold has a unique shimmering texture accented with six white diamonds. ...
Category
2010s British Artist Band Rings
Materials
Diamond, 9k Gold, Rose Gold
Georgios Collections 18 Karat Rose Gold Diamond Ring Band in Byzantine Style
Located in Astoria, NY
S.Georgios Special Edition Hand Made 18 Karat Rose Gold Ring with 0.68 Carat Blue Diamonds. The ring is microscopically decorated all the way around with gold beads and wires - granulation - shaped like the last letter of Greek Alphabet - Omega, which symbolizes eternal life and the background has a unique Velvet look in pink Rhodium...
Category
2010s Greek Byzantine Band Rings
Materials
Blue Diamond, Diamond, 18k Gold, Gold, Rose Gold
Art Deco Vintage 18 Karat White Gold Etched Design Wedding Band, circa 1920s
Located in Addison, TX
Here we have a genuine Art Deco wedding band crafted in 18 karat white gold! This has a beautiful classic Art Deco flower etched design wrapping all of the way around accented with m...
Category
Vintage 1920s Art Deco Band Rings
Materials
18k Gold, White Gold
Alex Jona White Diamond Baguette Platinum Eternity Band Ring
By Alex Jona
Located in Torino, Piedmont
Alex Jona design collection, hand crafted in Italy, Platinum eternity band ring, showcasing 15 baguette cut white diamonds bezel-set weighing 1.48 total carats, E color, VVS1 clarity...
Category
21st Century and Contemporary Italian Wedding Rings
Materials
Diamond, White Diamond, Platinum
Antique Sapphire and Diamond Ring
Located in Firenze, IT
The ring set to the front with two lines of alternating cushion-cut sapphires and diamonds, circa 1890.
7 old cut diamonds for an approximate total diamond weight of 1.50 carat
5 cus...
Category
Antique 1890s British Victorian Engagement Rings
Materials
Diamond, Sapphire, 18k Gold, Yellow Gold
Yellow Gold Eternity Ring
Located in Litchfield, CT
Circa 1970s, 18k, Swiss. This elegant seventies eternity band features 1.35 carats of fine white diamonds (G color, SI1 clarity) set in rich eighteen karat yellow gold. Unusually wid...
Category
Vintage 1970s Swiss Band Rings
Materials
Diamond, 18k Gold, Yellow Gold
Roman Malakov 8.75 Carats Emerald Cut Diamond Eternity Wedding Band
Located in New York, NY
Features a row of emerald cut diamonds set in an elegant, horizontal fashion weighing 8.75 carats total, E-F Color. Set in a shared-prong setting, Made in Platinum, Size 6.25 US resi...
Category
21st Century and Contemporary American Contemporary Wedding Rings
Materials
Diamond, Platinum
C. Dunaigre 11 Carat Mozambique Ruby Diamond Ring
Located in Chicago, IL
One cushion-shaped vivid red mozambique ruby 11 carats
Surrounded by two shield cut diamonds total 1.50 carat
platinum setting
Category
2010s American Band Rings
Materials
Diamond, Ruby, Platinum
$184,000 Sale Price
20% Off
Vintage 14 Karat Diamond Gem Set Harem Ring
Located in New York, NY
A charming vintage 14k yellow gold harem ring set with sapphires, emeralds, diamonds, turquoise and rubies, circa 1970. This harem ring is so called b...
Category
Vintage 1970s Unknown Modern Band Rings
Materials
Diamond, 14k Gold
Emerald and Diamond "Owl" Band Ring in 18k Yellow Gold
Located in Los Angeles, CA
This beautiful emerald and diamond "owl" ring is stunning worn on any finger and the perfect way to celebrate a special time or a special achievement, especially a graduation! Crafte...
Category
21st Century and Contemporary North American Artisan Band Rings
Materials
Diamond, Emerald, White Diamond, Gold, 18k Gold, White Gold, Yellow Gold
GIA Certified 6 Carat Fancy Yellow Cushion Diamond Yellow Gold Ring
Located in Chicago, IL
This exceptional ring features a GIA Certified 6.02-carat Fancy Yellow Cushion Modified Brilliant diamond, a striking gem of natural color origin with even color distribution and rem...
Category
2010s American Contemporary Band Rings
Materials
Diamond, Yellow Diamond, 18k Gold, Yellow Gold
$116,000 Sale Price
20% Off
Tiffany
Co Platinum Cigar Bend Ring
By Tiffany
Co.
Located in Scottsdale, AZ
Elevate your style with the timeless elegance of the Tiffany & Co Platinum Cigar Bend Ring – a classic and versatile piece that effortlessly blends sophisti...
Category
1990s Band Rings
Materials
Platinum
Antique 2.92 Carat Diamond and 18k Yellow Gold Five Stone Engagement Ring
Located in Jesmond, Newcastle Upon Tyne
A stunning, fine and impressive 2.92 carat diamond and 18 karat yellow gold, 18 karat white gold set five stone cocktail ring; part of our diverse antique diamond jewelry and estate ...
Category
Vintage 1930s Unknown Band Rings
Materials
Diamond, White Gold, Yellow Gold
HM LONDON 1993 18K Emerald Set Theo Fennell Gold Band Ring
By Theo Fennell
Located in Baltimore, MD
THEO FENNELL is a well known and treasured jewelry designer who is known for his classic jewelry lines as well as his one-off pieces. This rare find is from his earlier days, a hefty...
Category
1990s English Contemporary Band Rings
Materials
Emerald, 18k Gold
Circa 1899 Antique Victorian Platinum 18K Yellow Gold Wedding Band - Size 5.25
Located in Great Neck, NY
Beautiful Victorian platinum band with gorgeous engravings all the way around.
#R0382
Metal: Platinum & 18K Yellow Gold
Weight: 3.5 Grams
Ring Size: 5 1/4
*Unfortunately this ri...
Category
Antique Mid-19th Century Victorian Band Rings
Materials
18k Gold, Platinum
Still Thinking About These?
All Recently ViewedMore Ways To Browse
Platinum Chevron Wedding Band
Pomellato Diamond Heart Ring
Pt 950 Jewelry
Ramage Ring
Raphael Leon
Real Gold Mens Wedding Bands
Retro Claddagh Ring
Ring O Romance
Roberto Coin Flexible Rings
Roberto Coin Tiger Eye Ring
Santos Ring
Sapphire Rolling Ring
Sb Diamonds
Schlumberger Ring Size 5
Seidengang Band Rings
Silver Fede Ring
Skull Mourning Ring
Spinning Wedding Ring Piaget