18 Karat Gold Art Deco Style Cocktail Ring with Cabochon Black Onyx & Diamonds
By Doves by Doron Paloma
Located in Great Neck, NY
18K Yellow Gold Art-Deco style Ring featuring Black Onyx inlay and Diamonds. Split Shank. Finger size 6.5, adjustable upon request/quote. The Gatsby collection from Doves by Doron Pa...
Diamond, White Diamond, Onyx, Gold, 18k Gold, Yellow Gold
Handcrafted Round Cabochon Moonstone and Baguette Diamond Art Deco Cocktail Ring
Located in Sydney, NSW
One Hand Crafted Rose and White Gold 3.92 Carat Round Cut Moonstone, Bezel Set in Rose Gold and surrounded by 14 Baguette and Carre cut Diamonds weighing 0.65 carats, channel set in ...
Diamond, Moonstone, 18k Gold
Unavailable|$3,955
Art Deco Three-Stone Diamond and Bullet Cabochon Sapphire Ring
Located in Narberth, PA
A absolutely stunning diamond and sapphire 3-stone ring from the Art Deco (ca1920s) era! Crafted in platinum, this fabulous piece features a bold 3-stone design comprised of two diam...
Diamond, Sapphire, Platinum
Ladies Art Deco Platinum and Diamond Ring Set with Cabochon Siberian Amethyst
Located in Warrington, PA
Ladies Art Deco Platinum ring set with approximately 60.00 carat Cabochon Siberian medium dark vivid purple Amethyst.
Amethyst, Diamond, Platinum
Unavailable|$2,400
Art Deco Costume Jewelry Diamond Cut CZ Cabochon Lab Emerald Love Ring
By Magnificent Costume Jewelry
Located in New York, NY
The Art Deco Toi et Moi Love Ring In Costume Jewelry 10 Carat Each Diamond Cut Lab CZ and Lab Emerald Two stunning CZ diamond and cabochon pyramid emerald cuts in the Asscher cut ...
Diamond, Emerald, Sterling Silver
Vintage Art Deco Oval Cabochon Natural Blue Sapphire and Diamond Platinum Ring
Located in St. Louis Park, MN
This Platinum vintage Art Deco ring features one 10x7mm oval cabochon natural blue Sapphire.
Diamond, Blue Sapphire, Platinum
Unavailable|$4,000
Art Deco 1.40 Carat Cabochon-Cut Opal and Diamond Halo Platinum Ring
Located in Seattle, WA
Circa 1920. This lovely Art Deco ring features a cabochon-cut 1.40 carat opal bezel-set in platinum.
White Diamond, Opal, Platinum
Unavailable|$48,000
Andreoli CDC Certified Ruby Burma Cabochon Diamond Art Deco Style Dome Ring
By Andreoli
Located in New York, NY
Andreoli CDC Certified Ruby Burma Cabochon Diamond Art Deco Style Cocktail Dome Ring.
Diamond, White Diamond, Ruby, Gold, 18k Gold, Yellow Gold
Unavailable|$27,313
Art Deco 24.02 Carat Natural Ceylon Cabochon Sapphire Ring
Located in Essex, GB
A monumentally beautiful ring. The large cabochon sapphire in the centre – certified as natural, without heat treatment and originating from Ceylon – is secured by four split claws i...
Diamond, Sapphire, Blue Sapphire, Gold, 18k Gold, White Gold
Unavailable|$6,160
Art Deco Onyx & Diamond Platinum Ring
Located in Solvang, CA
This Art Deco ring features a cabochon onyx center measuring 10.40mm x 8.85mm x 5.53mm.
Diamond, Onyx, Platinum
Unavailable|$3,339
Art Deco 1.71 Carat Natural Cabochon Sapphire and Old Cut Diamond Ring
Located in Essex, GB
A sapphire and diamond ring of unbeatble class and beauty. The round cabochon sapphire in the centre – certified as natural and without heat treatments – is a rich and deep blue, the...
Diamond, Sapphire, Blue Sapphire, 18k Gold
Art Deco 4 Carat Ruby Cabochon & 1.50 Carats of Diamonds in Platinum Ring
Located in Scottsdale, AZ
This impressive Art Deco period handcrafted ring features a 4 carat natural no heat treated Ruby Cabochon center stone surrounded by 1.50 carats of old european brilliant cut and bag...
Diamond, Ruby, White Diamond, Platinum
Art Deco GIA Certified 16.97CT Burma No Heat Cabochon Sapphire and Diamond Ring
Located in New York, NY
Stunning Art Deco ring with a GIA Certified 16.97CT Burma No Heat Cabochon Sapphire as the center stone.
Diamond, Sapphire, Platinum
Art Deco Style 6.58 Cabochon Sapphire Diamond 14 Karat Gold White Gold Ring
By Fabio Ferrara
Located in Marcianise, IT
This Ring is inspired by Art Deco. Size ITA: 17 - USA: 8 We're a workshop so every piece is handmade, customizable and resizable.
White Diamond, Sapphire, 14k Gold, White Gold, Yellow Gold
18 Karat Gold Art Deco Style Ring Cabochon Oval Malachite Black Onyx Diamonds
By Doves by Doron Paloma
Located in Great Neck, NY
Art-Deco Style Cocktail Ring featuring Cabochon Oval Malachite, Black Onyx Inlay, and diamonds set in 18K yellow gold.
Diamond, White Diamond, Malachite, Onyx, 18k Gold, Yellow Gold
Unavailable
Art Deco Amethyst and Chrysoprase Ring
By Suzanne Belperron
Located in New York, NY
A ring bezel-set in the center with a modified step-cut amethyst, the shoulders and sides cascading with decreasing lines of bezel-set rectangular cabochon chrysoprase; mounted in si...
Amethyst, Chrysophrase, Silver
Unavailable|$2,120
Art Deco lapis lazuli ring in platinum
Located in PARIS, FR
Art Deco lapis lazuli ring in platinum. Art Deco ring with a lapis lazuli cabochon.
Lapis Lazuli, Platinum
Unavailable|$16,790
Art Deco Platinum Ruby & Diamond Halo Ring
Located in Narberth, PA
A beautiful star ruby halo ring from the Art Deco (ca1920s) era! Crafted in platinum, this ring features a bezel-set 6ct star ruby, which has not been treated with heat.
Diamond, Ruby, Platinum
Unavailable|$1,750
Antique Art Deco Jade Cat Ring
Located in Sale, Cheshire
A very unusual antique ring set with a carved jade cat (I think). It could be a monkey, but the body is definitely more cat-like. It's set in an Art Deco period white gold ring mount...
Jade, 9k Gold, White Gold
Unavailable|$3,298
Art Deco cluster opal ring in platinum
Located in PARIS, FR
Art Deco cluster opal ring in platinum. This antique cluster ring features a central cabochon-cut opal set in a close setting, surrounded by twelve old-cut diamonds.
Diamond, Opal, Platinum
Unavailable|$4,885
Art Deco 1.71 Carat Lavender Sapphire Platinum Ring
Located in METAIRIE, LA
This Art Deco Platinum Sapphire solitaire features an unusual Natural Lavender colored 1.71 carat Sapphire at 7.2mm in diameter, secured in 4 triangular Platinum prongs, creating the...
Sapphire, Platinum
Unavailable|$13,943
Art Deco 6.43 Colombian Cabochon Emerald and Diamond Coronet Cluster Ring
Located in Essex, GB
This mesmerising Colombian cabochon emerald takes centre stage in an impressive coronet cluster. The centre stone is a glowing blue-ish green and is rubover set within a surround of ...
Diamond, Emerald, Gold, 14k Gold, Yellow Gold
Unavailable|$8,193
Art Deco Style Sapphire and Diamond Ring
Located in London, GB
ART-DECO STYLE SAPPHIRE AND DIAMOND RING, centrally set with a cabochon cut sapphire, flanked by square cut blue sapphires and brilliant cut diamonds.
Diamond, Blue Sapphire, Sapphire, 18k Gold, White Gold
Unavailable|$8,885
Art Deco Double Emerald 14 Karat ByPass Ring
Located in METAIRIE, LA
This Art Deco Emerald ByPass Ring features two central Cabochon cut [Slightly Opaque] Intense Green Emeralds totaling 1.57 carats at 5.2mm-5.5mm in diameter.
Emerald, Diamond, 14k Gold, White Gold
Unavailable|$5,981
Art Deco Old Cut Diamond and Cabochon Ruby Trilogy Ring
Located in Theydon Bois, Essex
Gloriously different! The 0.80 carat old cut diamond in the centre displays a subtle champagne hue and is flanked by a pair of over-sized pinkish red cabochon rubies. The stones are ...
Diamond, Ruby, 14k Gold, White Gold
Unavailable|$16,376
Bague en or 18 carats sertie d'une Emeraude cabochon et de diamants Art Déco
Located in VERSAILLES, FR
Superbe bague en or 18 carats ornée d'une très belle émeraude de taille cabochon d'une couleur exceptionnelle et d'une très bonne pureté, la monture est sertie de diamants. Cette bag...
Diamond, Emerald, 18k Gold
Unavailable|$2,840
5 Carat Cabochon Sapphire and Diamond Ring
Located in New York, NY
5 Carat Cabochon Sapphire and Diamond Ring Stones: Cabochon Sapphire and Square Sapphire Stone Shape: Step Cut Stone Carat: 5 Carat Side Stones: Diamonds Stone Shape: Round Dia...
Diamond, Sapphire, 18k Gold
Carved Natural Ruby Cabochon Diamond Hook 18 Karat Gold Deco Intini Jewels Ring
By Intini Jewels
Located in Milano, IT
One of a kind natural 35 carat ruby ring with an abstract shell carved designed setted in a 18 karat white gold highlighting a round 0.13 carat diamond hook. Be ready for a unique pi...
Diamond, Ruby, Gold, 18k Gold, White Gold
Unavailable|$294 / item
18k Yellow Gold Quartz Cabochon Boho Chic Stackable Deco Ring Intini Jewels
By Intini Jewels
Located in Milano, IT
Our Natural Precious Stones resonate deeply with the wearer's soul. This collection of dainty stackable rings makes no exception, as it gracious charm and deep blue colour will fill ...
Quartz, Gold, 18k Gold, Yellow Gold
Unavailable|$294 / item
18k Yellow Gold Chalcedony Cabochon Boho Chic Stackable Deco Ring Intini Jewels
By Intini Jewels
Located in Milano, IT
Our Natural Precious Stones resonate deeply with the wearer's soul. This collection of dainty stackable rings makes no exception, as it gracious charm and deep blue colour will fill ...
Chalcedony, Gold, 18k Gold, Yellow Gold
Unavailable|$294 / item
18k Yellow Gold Kyanite Cabochon Boho Chic Stackable Deco Ring Intini Jewels
By Intini Jewels
Located in Milano, IT
Our Natural Precious Stones resonate deeply with the wearer's soul. This collection of dainty stackable rings makes no exception, as it gracious charm and deep blue colour will fill ...
Kyanite, Gold, 18k Gold, Yellow Gold
Unavailable|$2,474
Art Deco era 18K gold moonstone and diamond ring
Located in Versailles, FR
For sale an Art Deco era 18k white gold ring. At the heart of the ring is a large oval-shaped moonstone, measuring 15mm by 9.5mm, radiating with the most desirable bluish sheen. This...
Diamond, Moonstone, 18k Gold
Unavailable|$28,950
Andreoli Emerald Ruby Diamond Cabochon Bead Art Deco Style 18 Karat Cocktail
By Andreoli
Located in New York, NY
Andreoli Emerald Ruby Dome Diamond Cabochon Bead Art Deco Style 18KT Yellow Gold. This ring features a beautiful 2.20 carat dome shaped emerald cabochon center stone accented with 8....
Diamond, Emerald, Ruby, Gold, 18k Gold, Yellow Gold
Unavailable|$3,420
Cabochon Black Onyx, White Diamond Ring
Located in Scottsdale, AZ
Cabochon Black Onyx, White Diamond Ring. Featuring a Cabochon Black Onyx, White Diamond Ring with a total weight of 1.49 carats, set in Yellow Gold & Sterling Silver. Size, 7 Thr...
Diamond, Onyx, 18k Gold, Yellow Gold, Silver
Unavailable|$48,000
Sugarloaf Cabochon Sapphire Diamond Ring
By T. Foster & Co.
Located in Yardley, PA
This one-of-a-kind ring is set with an extraordinarily fine cabochon-cut sapphire. It is handcrafted in platinum with 18K yellow gold prongs, and set with diamonds of impeccable colo...
Diamond, Sapphire, 18k Gold, Platinum
Unavailable|$23,500
1 Carat Brazilian Paraiba Cabochon and Diamond Ring
By Romy Ivsic
Located in Los Angeles, CA
One of my favorite, this little cabochon is the much sought after neon blue from Brazil. Set in 14 kt white Gold with 1.1 carat Diamonds. I use 14 Kt instead of 18 Kt because it is s...
Diamond, Paraiba, 14k Gold
Unavailable|$2,827
Art Deco Jade diamond ring in 14 karat white gold
Located in PARIS, FR
Art Deco Jade diamond ring in 14 karat white gold.
Diamond, Jade, 14k Gold, White Gold
Contemporary Art Deco Ring, Lapis Lazuli set in large Turquoise stone
By Merideth McGregor
Located in New York, NY
This unique contemporary Art Deco ring has a stunning Lapis Lazuli Stone set in a large turquoise stone. Merideth McGregor's inspirational piece captures the beauty of the turquoise ...
Moonstone, Jasper, Sterling Silver
Blue Quartz Art Deco ring with Turquoise Stone set in Sterling Silver
By Merideth McGregor
Located in New York, NY
Blue Quartz Art Deco ring with Turquoise Stone set in Sterling Silver
Quartz, Turquoise, Sterling Silver
Jasper Art Deco ring with Lavender Quartz Stone set in Sterling Silver
By Merideth McGregor
Located in New York, NY
Jasper Art Deco ring with Lavender Quartz Stone set in Sterling Silver
Quartz, Jasper, Sterling Silver
Blue Chalcedony Art Deco ring with Turquoise Stone set in Sterling Silver
By Merideth McGregor
Located in New York, NY
Blue Chalcedony Art Deco Ring with Turquoise Stone set in Sterling Silver. Chalcedony is a member of the Quartz family. Its name may be derived from the Greek port city of Chalcedon....
Chalcedony, Turquoise, Sterling Silver
Carnelian Art Deco ring with Lapis Lazuli Stone set in Sterling Silver
By Merideth McGregor
Located in New York, NY
Carnelian Art Deco ring with Lapis Lazuli Stone set in Sterling Silver. The deep blue of the lapis lazuli stands out set in the carnelian. Lapis Lazuli is a powerful stone that help...
Carnelian, Lapis Lazuli, Sterling Silver
Unavailable|$3,500
2.80 Carat Emerald Cabochon Diamond Dress RIng
Located in Hong Kong, HK
Art Deco-Inspired Emerald Cabochon & Diamond Ring in 18K White Gold A masterpiece of geometry, symmetry, and elegance — this Art Deco-inspired ring captures the bold glamour of the ...
Diamond, Emerald, 18k Gold, White Gold
Unavailable|$3,836
Art Deco Pink Star Sapphire and Diamond Ring 4.88 Carat 18K
Located in Mammoth Lakes, CA
Stunning 1930's Art Deco Pink Star Sapphire and Diamond Dinner - or Cocktail - Ring (cocktails first, then dinner!). The Art Deco platinum mounting is as perfect as it gets. The rin...
Diamond, Pink Sapphire, Star Sapphire, 18k Gold
Carnelian Art Deco ring with Lapis Lazuli Stone set in Sterling Silver
By Merideth McGregor
Located in New York, NY
Carnelian Art Deco ring with Lapis Lazuli Stone set in Sterling Silver. The deep blue of the lapis lazuli stands out set in the carnelian. Lapis Lazuli is a powerful stone that help...
Carnelian, Lapis Lazuli, Sterling Silver
Unavailable|$195
Lalique Gourmande Cabochon Glass Ring Black Size 5.5
By Lalique
Located in Los Angeles, CA
Classic and Quintessential Lalique Gourmande Cabochon Glass Ring in Black Glass Designed by René Lalique in 1931, evoking the Art Deco era with its volutious form and assortment of c...
Lavender Jade Oval Stepped Cabochon Sterling Silver Retro Cocktail Intini Ring
By Intini Jewels
Located in Milano, IT
This minimalist design enhances a precious natural Lavender Jade cabochon. The Sterling Silver ring highlights the white color, surrounding into a glamorous touch and eccentric 3 hoo...
Jade, Sterling Silver
Antique 8ct Gold Baltic Amber Poison Ring Art Deco c1920 333 Purity
Located in Camelford, GB
If you have landed on this page then you have an eye for beauty. On offer is this gorgeous 8CT GOLD ART DECO AMBER BULLET STATEMENT RING DETAILS Material: 8ct 333/000 Thick Yellow...
Amber, Gold, 9k Gold
Art Deco Diamond Opal Halo Ring, Solid 14k Gold Ethiopian White Opal Target Ring
Located in Rottedam, NL
A beautiful, heavy and extremely rare Art Deco style diamond ring set with an authentic Ethiopian milky opal, rubies and 33 diamonds worth of 1.65 CT.
Diamond, Opal, Ruby, 14k Gold, White Gold, Yellow Gold
Unavailable|$1,800
14K Yellow Gold and Cabochon Fire Opal Ring
Located in Eagan, MN
This gorgeous custom made ring came out of a wealthy estate in Montreal Canada. It is a US size 7. The design is spectacular and it weighs a hefty 12.86 grams. It's a one-of-a-kin...
Fire Opal, 14k Gold, Yellow Gold
Art Deco Style 18k Yellow Gold Silver Diamond Sapphire Cocktail Butterfly Ring
Located in Pamplona, Navarra
Art Deco Style 18k Yellow Gold Silver Diamond Sapphire Cocktail Butterfly Ring.
Diamond, Sapphire, Blue Sapphire, 18k Gold, Yellow Gold, Silver
Unavailable|$1,220
14K White Gold 1.90 Carat Cabochon Emerald and 0.70 Carat Diamond Ring
Located in Murrieta, CA
This stunning 14K white gold ring showcases a beautiful cabochon emerald at its center, surrounded by sparkling diamonds. The total estimated weight of the emerald is an impressive 1...
Diamond, Emerald, 14k Gold, White Gold
Unavailable|$488,000
Antique Unheated 6 Carat Sugar Loaf Cabochon Sapphire Ring
Located in La Jolla, CA
6ct Sugar Loaf Cut Cabochon Sapphire Ring. Art deco period platinum filigree ring set with a 6.08ct sugar loaf cut cabochon sapphire and side diamonds weighing 0.30cts.
Sapphire
18 Karat Yellow Gold Natural White Agate Stepped Cabochon Artisan Cocktail Ring
By Intini Jewels
Located in Milano, IT
This minimalist design enhances a matte precious natural 11 carats agate cabochon. The 18 karat gold ring highlights the white color, surrounding into a glamorous and eccentric touch...
Agate, Gold, 18k Gold, Yellow Gold
Antique Cabochon Cut Natural Emerald Diamond Engagement Ring, Cocktail Ring
Located in Orlando, Florida
Antique Cabochon Cut Natural Emerald Diamond Engagement Ring, Cocktail Ring A stunning ring featuring IGI/GIA Certified 1.55 Carat Natural Emerald and 0.08 Carat of Diamond Accents ...
Diamond, Emerald, Gold, 18k Gold, Yellow Gold
Unavailable|$375 / item
Billie Enamel Ring with Cabochon Citrine in Gold
By Adore Adorn
Located in Atlanta, GA
What's in a ring? Enough power to evoke certain emotions and feelings or set the tone for your entire day. The Billie ring lends a playful twist to your attire. Bring out the best o...
Citrine, Gold, Enamel
Unavailable|$3,414
Cabochon Emerald and Diamond Cluster Ring Yellow and White Gold
Located in East Grinstead, GB
Cabochon Emerald and Diamond Cluster Ring 18 Karat Yellow and White Gold Dazzling cushion cut cabochon emerald and diamond cluster ring. Stunning central cushion sugarloaf cabochon ...
Diamond, White Diamond, Emerald, Gold, White Gold, Yellow Gold
Fascination with the Jazz Age is endless, and even today jewelry designers continue to be inspired by authentic Art Deco jewelry and watches.
The Art Deco period, encompassing the 1920s and ’30s, ushered in a very distinct look in the design of jewelry. There were many influences on the jewelry of the era that actually began to take shape prior to the 1920s. In 1909, Serge Diaghilev brought the Ballet Russes to Paris, and women went wild for the company’s exotic and vibrant costumes It’s no wonder, then, that jade, lapis lazuli, coral, turquoise and other bright gemstones became all the rage. There already existed a fascination with the East, particularly China and Japan, and motifs consisting of fans and masks started to show up in Art Deco jewelry.
However, the event that had the greatest influence on Deco was the excavation of the tomb of King Tut in 1922. When the world saw what was hidden in Tut’s burial chamber, it sent just about everyone into a frenzy. Pierre Cartier wrote in 1923 that “the discovery of the tomb will bring some sweeping changes in fashion jewelry.” And he couldn’t have been more right. “Egyptomania” left an indelible mark on all of the major jewelry houses, from Cartier to Van Cleef & Arpels, Boucheron and Georges Fouquet. (Cartier created some of the most iconic jewelry designs that defined this era.)
While a lot of Art Deco jewelry was black and white — the black coming from the use of onyx or black enamel and the white from rock crystal and diamonds — there is plenty of color in jewelry of the era. A perfect accent to diamonds in platinum settings were blue sapphires, emeralds and rubies, and these stones were also used in combination with each other.
Many designers employed coral, jade and lapis lazuli, too. In fact, some of the most important avant-garde jewelers of the period, like Jean Després and Jean Fouquet (son of Georges), would combine white gold with ebony and malachite for a jolt of color.
A lot of the jewelry produced during this time nodded to current fashion trends, and women often accessorized their accessories. The cloche hat was often accented with geometric diamond brooches or double-clip brooches. Backless evening dresses looked fabulous with sautoir necklaces, and long pearl necklaces that ended with tassels, popular during the Edwardian period, were favored by women everywhere, including Coco Chanel.
Find unique Art Deco necklaces, earrings, bracelets and other jewelry on 1stDibs.
Antique and vintage rings have long held a special place in the hearts of fine jewelry lovers all over the world.
No matter their origin or specific characteristics, rings are timeless, versatile accessories. They’ve carried deep meaning since at least the Middle Ages, when diamond rings symbolized strength and other kinds of rings were worn to signify romantic feelings or to denote an affiliation with a religious order. Rings have also forever been emblematic of eternity.
Over time, rings have frequently taken the form of serpents, which have long been associated with eternal life, health and renewal. Italian luxury jewelry house Bulgari has become famous for its widely loved Serpenti motif, for example, and its Serpenti ring, like the other accessories in the collection, began as an homage to jewelry of the Roman and Hellenistic eras. The serpent is now a popular motif in fine jewelry. Jewelry devotees have long pined for rings adorned with reptiles, thanks to antique Victorian rings — well, specifically, Queen Victoria’s illustrious engagement ring, which took the form of a gold snake set with rubies, diamonds and an emerald (her birthstone). Designs for Victorian-era engagement rings often featured repoussé work and chasing, in which patterns are hammered into the metal.
Engagement rings, which are reliably intimidating to shop for, are still widely recognized as symbols of love and commitment. 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.
The most collectible antique engagement rings and vintage engagement rings are those from the Victorian, Edwardian and Art Deco eras. Named for the monarchies of the four King Georges, who in succession ruled England starting in 1714 (plus King William’s reign), antique Georgian rings, be they engagement rings or otherwise, are also coveted by collectors. Pearls, along with colored gemstones like garnets, rubies and sapphires, were widely used in Georgian jewelry. The late-1700s paste jewelry was a predecessor to what we now call fashion or costume jewelry.
The Art Nouveau movement (1880–1910) brought with it rings inspired by the natural world. Antique Art Nouveau rings might feature depictions of winged insects and fauna as well as women, who were simultaneously eroticized and romanticized, frequently with long flowing hair. Art Deco jewelry, on the other hand, which originated during the 1920s and ’30s, is by and large “white jewelry.” White metals, primarily platinum, were favored over yellow gold in the design of antique Art Deco rings and other accessories as well as geometric motifs, with women drawn to the era’s dazzling cocktail rings in particular.
Whether you’re hunting down a chunky classic for a Prohibition-themed cocktail party or seeking a clean contemporary design to complement your casual ensemble, find an exquisite collection of antique, new and vintage rings on 1stDibs.
Learn about these antique jewelry styles, then choose a design that speaks to you.
Ready to rock? Some of our favorite jewelry designers and dealers share indispensable advice for choosing that most important ring.
Will your beloved be enchanted by an Edwardian ring or a trendy Art Deco piece? We clue you into period styles and tips for finding the perfect ring.