Oval Green Emerald & Diamond Halo Set Art Deco Style Floral 18K Gold Ring
By Unbranded
Located in Tysons, VA
Ring Information Style: Art-deco Metal: 18K Yellow Gold Total weight: 3.98 g.
Diamond, Emerald, 18k Gold, Yellow Gold
ART DECO 1940 Cocktail Ring In Platinum With 2.34 Cwt Carre Diamonds & Emeralds
Located in Miami, FL
An art-deco platinum ring with large sapphire and diamonds.
Diamond, Emerald, White Diamond, Platinum
Antique Art Deco Platinum Engraved Wedding Band
Located in Great Neck, NY
#R0202 Metal: Platinum Weight: 2.1 Grams Ring Size: 7 (sizable) This ring can be sized for a $30 fee!
Platinum
Platinum Yellow Gold Art Deco Style Yellow Citrine Blue Sapphire & Diamond Ring
Located in New York, NY
A unique Vintage style, Art Deco Style Yellow 8.02cts citrine engagement ring.
Citrine, Diamond, Blue Sapphire, Yellow Gold, Platinum
18ct Gold & Platinum 1920s Art Deco Diamond and Sapphire Rectangular Plaque Ring
Located in Brighton, GB
UK Size N 1/2 US Size 7 This ring can be resized using our resizing service, please contact us to discuss this before purchase.
Diamond, Sapphire, Gold, 18k Gold, Platinum
GIA 1.1 Carat Green Emerald Diamond Sapphire Art Deco 18K Gold Ring
Located in Los Angeles, CA
Russian Emerald Diamond Sapphire 3.42 Carat GIA Estate Ring 18K Yellow Gold. This estate ring features a natural Russian emerald center accented by diamonds and blue sapphires, craft...
Diamond, Emerald, Sapphire, Yellow Gold, 18k Gold
Antique Art Deco 1.32 Carat Diamond and 14 Karat White Gold Ring Circa 1930
Located in Jesmond, Newcastle Upon Tyne
A stunning, fine and impressive antique 1.32 carat diamond and 14 karat white gold ring; part of our diverse collection of Art Deco jewelry.
Diamond, White Gold
Art Deco Style 3.92ct Blue Aquamarine & Diamond 18k Rose Gold Ring Radiant Cut
Located in SYDNEY, AU
Elegantly designed, this 18ct rose & white gold Art Deco style ring features a large 3.92 carat, radiant cut light blue natural aquamarine to a halo surround of thirty sparkling,...
Aquamarine, Diamond, 18k Gold, Rose Gold, White Gold
Art Deco Old European Cut Diamond 18 Karat Gold Vintage Stepped Engagement Ring
Located in Philadelphia, PA
Centering an old European cut diamond weighing approximately 0.36 carat total - I color with SI1 clarity Bead set in a square form head and flanked by pierced stepped shoulders with ...
Diamond, Gold, 18k Gold
Deco Ring with Diamonds & Pearl
Located in Milano, MI
Unusual Deco period ring set in gold and platinum with rose cut and old cut diamonds and pearl. Highlights - Platinum and gold - Rose cut and old cut diamonds - Cultured pearl Meas...
Diamond, Pearl, 18k Gold
Antique Art Deco Platinum and Yellow Gold Old European Diamond Engagement Ring
Located in Great Neck, NY
Beautiful Antique Art Deco Platinum and Yellow Gold Old European Diamond Engagement Ring.
Diamond, Yellow Gold, Platinum
Oval Shape Blue Sapphire & Diamond Vintage Art Deco Style Halo White Gold Ring
By Unbranded
Located in Tysons, VA
Ring Information Style: Art-deco Total weight: 4.02 g.
Diamond, Blue Sapphire, 14k Gold, White Gold
Art Deco 14K White Gold Aquamarine Ring, 0.29 Carat, By Roshe Jewels
By Roshe Jewels
Located in Los Angeles, CA
Cute and dainty everyday Aquamarine white gold ring Straight baguette cut Aquamarine weighs 0.29 carats 14K White Gold is 2.7 grams Ring size is 7 and can be resized at no extra charge
Aquamarine, 14k Gold, White Gold
$2,015Sale Price|20% Off
Art Deco White Diamond Mediterranean Red Coral Onyx Yellow Gold Cocktail Ring
By Luigi Ferrara
Located in Naples, IT
For any problems related to some materials contained in the items that do not allow shipping, please contact the seller with a private message to solve the problem. We can ship every...
Coral, Diamond, White Diamond, Onyx, 14k Gold, Yellow Gold
Diamond Cluster & Green Emerald Fancy Halo Set Art Deco Style White Gold Ring
By Unbranded
Located in Tysons, VA
Ring Information Style: Art-deco Total weight: 4.50 g.
Diamond, Emerald, 14k Gold, White Gold
Oval Emerald Ruby & Diamond Art Deco Style Floral 18K White Gold Halo Ring
By Unbranded
Located in Tysons, VA
Ring Information Style: Art-deco Metal: 18K White Gold Total weight: 5.15 g.
Diamond, Emerald, Ruby, 18k Gold, White Gold
Emerald & Black Onyx and Diamond Art Deco Style Target 14K White Gold Ring
By Unbranded
Located in Tysons, VA
(approx. total weight) Ring size: US 7 (resizable) Center Gemstones Type: Emerald Shape: Oval Size: 9 x 7 mm.
Diamond, Emerald, Onyx, 14k Gold, White Gold
Antique Art Deco Platinum GIA Old European Diamond Engagement Ring & Band Set Ba
Located in Montclair, NJ
Please contact us prior to purchase for sizing inquiries.) Rings Width: 13mm (0.5") (engagement ring - north to south) - 2.8mm (wedding band - at the sapphires) Rings Height: 8.3mm (...
Diamond, Sapphire, Platinum
Vintage Art Deco Diamond Ruby Ring 18k White & Rose Gold Center 1.09 ct (#1)
Located in Brooklyn, NY
Art Deco Style Colorful Ring - Statement and Bold Center Diamond surrounded with Red Ruby, sides have white Diamonds All stones are Natural 18k White & Rose Gold 8.60 grams Nat...
Diamond, Ruby, 18k Gold, White Gold, Rose Gold
Vintage Art Deco Diamond Ring Conversion 7.5 18k Gold Elongated Filigree Jewelry
Located in Torrance, CA
Finely detailed vintage Art Deco diamond ring (circa 1920s to 1930s) crafted in 18k & 10k white gold.
Diamond, White Diamond, Gold, 10k Gold, 18k Gold, White Gold
Peridot Pink Sapphire Diamond Multi Gemstone Art Deco Style Ring in 14k Gold
Located in Bangkok, TH
Ring Information Style: Art Deco Metal: 14K Yellow Gold Weight: 4.21 g.
Diamond, Peridot, Multi-gemstone, Pink Sapphire, Gold, 14k Gold, Yellow ...
Men’s Art Deco Style Baguette Amethyst Silver, gold ring
By Daizy Jewellery
Located in Istanbul, TR
Architectural Amethyst Men’s Ring. Art Deco Amethyst Men’s Wedding Band. Men’s Baguette and Princess-Cut Amethyst Ring.
Amethyst, Gold Plate, Silver
$3,552Sale Price / item|20% Off
Art Deco Natural Emerald Regalia Ring with Diamonds 14k Solid White Gold
By VR Jewels
Located in New York, NY
PRODUCT DETAILS :- Material - 14K Solid White Gold Gemstone - Emerald Gemstone Weight - 1.92 ct Gemstone pcs - 1 Gemstone shape - Oval Gemstone size - 9 x 7 mm Diamond Weight - 0.9...
Diamond, Emerald, Gold, 14k Gold, White Gold
$3,848Sale Price|20% Off
Art Deco Style Mediterranean Red Coral White Diamond Yellow Gold Cocktail Ring
By Luigi Ferrara
Located in Naples, IT
For any problems related to some materials contained in the items that do not allow shipping, please contact the seller with a private message to solve the problem. We can ship ever...
Coral, Diamond, White Diamond, 14k Gold, Yellow Gold
Vintage 1950s Art Deco Diamond and Platinum Cocktail Ring
Located in Jesmond, Newcastle Upon Tyne
A fine and impressive vintage 0.50 carat diamond and platinum Art Deco ring; part of our diverse range of Art Deco jewelry/jewelry.
Diamond, Platinum
Ruby and Diamond Art Deco Style Octagonal Engagement Ring in 18k White Gold
Located in Bangkok, TH
Ring Information Style: Art-deco Metal: 18K White Gold Total weight: 5.00 g.
Diamond, Ruby, 18k Gold, White Gold
$2,920Sale Price|25% Off
Art Deco White Brilliant Cut Diamond Blue Sapphire Yellow Gold Cocktail Ring
By Luigi Ferrara
Located in Naples, IT
For any problems related to some materials contained in the items that do not allow shipping, please contact the seller with a private message to solve the problem. We can ship every...
Diamond, White Diamond, Sapphire, Blue Sapphire, 9k Gold, Yellow Gold
Platinum Art Deco Style Diamond GIA 2.01 Carat Vivid Purple Oval Sapphire Ring
Located in Los Angeles, CA
GIA Report Number 5222913111 Size- 7. FREE SIZING!!!! Handmade Art Deco Inspired GIA Amazing and Electric Oval Vivid Purple Sapphire Antique Style Engagement Ring Created in Plati...
Diamond, Sapphire, Platinum
Oval Green Emerald & Sapphire Diamond Art Deco Style Halo 18K White Gold Ring
By Unbranded
Located in Tysons, VA
Ring Information Style: Art-deco Metal: 18K White Gold Weight: 5.99 g.
Diamond, Emerald, Blue Sapphire, 18k Gold, White Gold
Art Deco 14K White Gold & 1.2 Ct. Marquise Cut Aquamarine Filigree Cocktail Ring
Located in Philadelphia, PA
A fine antique Art Deco white gold & aquamarine cocktail ring.
Aquamarine, White Gold
Art Deco Woods & Sons 18 Karat Gold Vintage Orange Blossom Wedding Band Ring
Located in Philadelphia, PA
Featuring an engraved orange blossom motif fully around Accented by milgrain edges Stamped for 18 karat gold With maker's mark for Woods & Sons Circa: 1930s Ring Size: 7 and siza...
Gold, 18k Gold, White Gold
$7,329Sale Price|20% Off
Art Deco Style Diamond Mediterranean Red Coral Onyx Yellow Gold Cocktail Ring
By Luigi Ferrara
Located in Naples, IT
For any problems related to some materials contained in the items that do not allow shipping, please contact the seller with a private message to solve the problem. We can ship every...
Coral, Diamond, White Diamond, Onyx, 14k Gold, Yellow Gold
GIA Certified .74 Carat Art Deco Diamond Platinum & 18 Karat YG Engagement Ring
Located in Hicksville, NY
Item Details: Ring Size: 7 Metal Type: Platinum & 18 Karat Yellow Gold [Hallmarked, and Tested] Weight: 2.8 grams Center Diamond Details: GIA REPORT #: 2213425898 Weight: .74 carat...
Diamond, 18k Gold, Platinum
$5,039Sale Price|20% Off
Art Deco Emerald White Diamond Sapphire Yellow Gold Triple Cocktail Ring Set
By Luigi Ferrara
Located in Naples, IT
This Ring is inspired by Art Deco. Size ITA: 16 USA: 7 1/2 We're a workshop so every piece is handmade, customizable and resizable.
Diamond, White Diamond, Emerald, Sapphire, Blue Sapphire, 18k Gold, Yell...
18K Gold Art Deco Style Orange Red Ruby Natural Diamond Oval Halo Ring
Located in SYDNEY, AU
Surrounding the ruby is a halo of thirty brilliantly sparkling round brilliant-cut natural diamonds, creating an exquisite contrast of fire and colour. The ring is inspired by classi...
Diamond, Ruby, 18k Gold, White Gold, Yellow Gold
Asscher Blue Aquamarine & Diamond Halo Set Art Deco Style 14K White Gold Ring
By Unbranded
Located in Tysons, VA
Ring Information Style: Art-deco Total weight: 4.00 g.
Aquamarine, Diamond, Gold, 14k Gold, White Gold
Art Deco Style Emerald Cut Blue Aquamarine & Diamond Onyx 14K White Gold Ring
By Unbranded
Located in Tysons, VA
14K White Gold. Ring Information Style: Art-deco Total weight: 6.70 g.
Aquamarine, Diamond, Onyx, 14k Gold, White Gold
Art Deco 2.85 CTW No Heat Ceylon Sapphire Diamond Platinum Vintage Bombé Ring
Located in Philadelphia, PA
Centering a cushion cut sapphire weighing approximately 1.35 carats - transparent medium blue Natural Ceylon (Sri Lankan) in origin with no indications of heat treatment Bezel set to...
Diamond, Sapphire, Platinum
$1,649Sale Price|20% Off
Art Deco Style White Brilliant Cut Diamond Citrine Yellow Gold Cocktail Ring
By Luigi Ferrara
Located in Naples, IT
For any problems related to some materials contained in the items that do not allow shipping, please contact the seller with a private message to solve the problem. We can ship every...
Citrine, Diamond, White Diamond, 14k Gold, Yellow Gold
Art Deco Style Green Zambian Emerald & Diamond Black Onyx White Gold Shield Ring
By Unbranded
Located in Tysons, VA
Ring Information Style: Art-deco Total weight: 6.60 g.
Diamond, Emerald, Onyx, 14k Gold, White Gold
Oval Opal & Ruby and Diamond Art Deco Style Halo Set Yellow Gold Ring
By Unbranded
Located in Tysons, VA
(approx. total weight) Ring size: US 3-8 Center Gemstones Type: Opal Shape: Oval Size: 7 x 5 mm.
Diamond, Opal, Ruby, 14k Gold, Yellow Gold
$2,382Sale Price|20% Off
Art Deco Style White Brilliant Cut Diamond Aquamarine White Gold Cocktail Ring
By Luigi Ferrara
Located in Naples, IT
For any problems related to some materials contained in the items that do not allow shipping, please contact the seller with a private message to solve the problem. We can ship every...
Aquamarine, Diamond, White Diamond, 18k Gold, White Gold
Antique Art Deco Jabel 18k White Gold 0.60ct Diamond Engraved Filigree Work Ring
By Jabel
Located in Montclair, NJ
Material: Solid 18 White Gold Weight: 3.29 Grams Ring Size: 7.0 ( fitted on finger, please contact us prior to purchase with sizing inquiries) Ring Width: 12.1mm (0.47") (top of the...
Diamond, Gold, 18k Gold, White Gold
Oval Shape Green Emerald Sapphire Diamond Art Deco Style Shield White Gold Ring
By Unbranded
Located in Tysons, VA
The Emerald, Sapphire, and Diamond Art Deco Style Dinner Ring features a stunning 2.1 carat emerald at the center, surrounded by sparkling diamonds that enhance its vibrant green hue.
Diamond, Emerald, Blue Sapphire, 18k Gold, White Gold
Antique Art Deco White Gold .18ctw Old Cut Diamond Filgree Engraved Work Ring
Located in Montclair, NJ
Material: Solid 18k White Gold Weight: 2.65 Grams Ring Size: 7.5 ( fitted on finger, please contact us prior to purchase with sizing inquiries) Ring Width: 10.6mm (0.41") (top of the...
Diamond, Gold, 18k Gold, White Gold
Ceylon Sapphire and Diamond Art Deco Style Engagement Ring in 18K White Gold
Located in Bangkok, TH
Ring Information Style: Art-deco Metal: 18K White Gold Total weight: 5.39 g.
Diamond, Sapphire, 18k Gold, White Gold
$1,832Sale Price|20% Off
Art Deco Style Diamond Mediterranean Red Coral Onyx Yellow Gold Cocktail Ring
By Luigi Ferrara
Located in Naples, IT
For any problems related to some materials contained in the items that do not allow shipping, please contact the seller with a private message to solve the problem. We can ship every...
Coral, Diamond, White Diamond, Onyx, 14k Gold, Yellow Gold
$1,282Sale Price|20% Off
Art Deco White Brilliant Cut Zircon Aquamarine White Gold Plate Cocktail Ring
By Luigi Ferrara
Located in Naples, IT
For any problems related to some materials contained in the items that do not allow shipping, please contact the seller with a private message to solve the problem. We can ship every...
Aquamarine, Zircon, Gold Plate, White Gold, Sterling Silver
Oval White Australian Opal Emerald Diamond Art Deco Style Halo 14K Gold Ring
By Unbranded
Located in Tysons, VA
The milgrain adds to the vintage style. 14K Yellow Gold. Ring Information Style: Art-deco Total weight: 3.04 g.
Diamond, Emerald, Opal, 14k Gold, Yellow Gold
Diamond Illusion Set & Blue Sapphire Fancy Halo Art Deco Style White Gold Ring
By Unbranded
Located in Tysons, VA
This elegant Art Deco style 18k white gold ring featuring a total of 9 diamonds set in illusion setting to form an emerald cut diamond shape.
Diamond, Blue Sapphire, 18k Gold, White Gold
Opal Sapphire Diamond Art Deco Style Target Engagement Ring in 14K White Gold
Located in Bangkok, TH
Ring Information Style: Art-deco Metal: 14K White Gold Total weight: 3.10 g.
Diamond, Opal, Sapphire, 14k Gold, White Gold
$7,919Sale Price|20% Off
Art Deco 2.35 CT Natural Diamond Old European Cut Engagement Ring 18K White Gold
Located in Los Angeles, CA
Art Deco 2.35 Carat Old European Cut Diamond Engagement Ring in 18K White Gold.
Diamond, White Gold
Round Diamond & Green Emerald Halo Set Art Deco Style 18K White Gold Ring
By Unbranded
Located in Tysons, VA
Ring Information Style: Art-deco Weight: 4.50 g.
Diamond, Emerald, 18k Gold, White Gold
$19,240Sale Price|20% Off
Art Deco Style White Diamond Blue Ceylon Sapphire White Gold Cocktail Ring
By Luigi Ferrara
Located in Naples, IT
For any problems related to some materials contained in the items that do not allow shipping, please contact the seller with a private message to solve the problem. We can ship ever...
Diamond, White Diamond, Sapphire, Blue Sapphire, 18k Gold, White Gold
London Blue Topaz Emerald Diamond Art Deco Style Celebrate 14K White Gold Ring
By Unbranded
Located in Tysons, VA
Each side and shoulders set off with round diamond with milgrain edge. Ring Information Style: Art-deco Total weight: 4.30 g.
Diamond, Emerald, Blue Topaz, 14k Gold, White Gold
Antique Art Deco White Gold Diamond East West Wheat Engraved Work Band Ring
Located in Montclair, NJ
–Stone(s): – (7) Natural Genuine Diamonds - Old Single Cut & Old English Cut - Pave Set - Nice Brilliant White Color Material: Solid 18k White Gold Total Weight: 3.39Grams Overall ...
Diamond, Gold, White Gold
Art Deco Old European Diamond Platinum Ring w/ 2 Large Old European Diamond
Located in Hicksville, NY
Item Details: Ring Size: 7 Metal Type: Platinum Weight: 3.50 grams Main White Diamond Details Shape: Old European Brilliant Carat Weight: .50ct (Approximate) Color: I Clarity: VS1 ...
Diamond, Platinum
White Ethiopian Opal & Green Emerald Diamond Art Deco Style 14K White Gold Ring
By Unbranded
Located in Tysons, VA
Ring Information Style: Art-deco Metal: 14K White Gold Weight: 4.69 g.
Diamond, Emerald, Opal, 14k Gold, White Gold
Art Deco Platinum Hexagonal Ring with 1.80ct G VVS Trilliant Diamond, circa 1930
Located in Malmö, Skåne län
G/vvs Gross weight: 4.80 g. Ring size us 7, 54. O, 17.25, 14 (re-sizeable) This is not a standard piece that one comes across every day.
Diamond, Platinum
$1,465Sale Price|20% Off
Art Deco Style Handcrafted White Rose Cut Diamond Yellow Gold Band Ring
By Luigi Ferrara
Located in Naples, IT
For any problems related to some materials contained in the items that do not allow shipping, please contact the seller with a private message to solve the problem. We can ship every...
Diamond, White Diamond, 9k Gold, Yellow Gold, Sterling Silver
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.