Design Theory

Design Theory Vintage + modern treasures influenced by nature, art and glamour! www.designtheoryjewelry.com Pieces from 3000 BC to today!

Design Theory - Heirloom + modern jewelry and treasures created and curated by travelers and gem lovers. Design Theory has a special line of new and vintage engagement rings under $1000. Let us know if you have a special request or want to do layaway 800-710-2780 or [email protected]

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This is a beautiful alternative to a traditional engagement ring.
02/27/2025

This is a beautiful alternative to a traditional engagement ring.

Glorious antique aquamarine ring with detailed sterling setting indicative of the time. Size 5.5 that can be sized by a good jeweler.

This is for the Aquarius babies out there!
02/13/2025

This is for the Aquarius babies out there!

Glorious light purple hue to this huge 9 carat Amethyst set in a fleurette shape with 40 Rose Cut Diamonds totaling nearly 1/2 a carat in weight. It is in sterling with gold embellishments. This is a luxury item.

Are you looking for a dark green smouldering stone that reflects your inner green goddess?  Look no further than this st...
02/04/2025

Are you looking for a dark green smouldering stone that reflects your inner green goddess? Look no further than this stunner!

Intense Green Tourmaline (over 3.5 carats) set off by a setting that is studded with numerous natural diamonds. De-Lovely!! Sterling + 14K Gold Setting that is a small size 4, indicative of the era.

Take a closer look at the stunning hues of this rhodolite ring...all the colors of a beautiful glass of red wine!
11/06/2024

Take a closer look at the stunning hues of this rhodolite ring...all the colors of a beautiful glass of red wine!

Alluring emerald cut trilogy ring with pinkish toned Rhodolite Garnet at the Center (1.3cts-5mm x7mm) from the Orissa mine in India. It is flanked on either side by a deep Red Garnet (.75ct each) from Mozambique. This piece is set in sterling. Absolutely perfect for everyday wear. Size 8 can be size...

This sapphire starburst ring is a sight to behold!
11/05/2024

This sapphire starburst ring is a sight to behold!

5.2 Carat Victorian Sapphire Starburst Ring, large flowery starburst pattern set in silver. Size 9, can be sized by your jeweler. Amazing and rare.

Glorious mine cut diamond statement ring with unique shape and gold vermeil setting.
10/26/2024

Glorious mine cut diamond statement ring with unique shape and gold vermeil setting.

Unique, oval shaped ring rose cut diamonds radiating out into six bright unshaped diamonds totaling .88 carats. Gold vermiel covers the setting and shank. Size 8.5.

Charming diamond encrusted butterfly themed pendant in silver.
10/12/2024

Charming diamond encrusted butterfly themed pendant in silver.

Diamond Encrusted Dragonfly Pendant, Silver Setting.

I love this ring from the Art Deco era with rubies and a pearl in the center.  Just gorgeous!
10/08/2024

I love this ring from the Art Deco era with rubies and a pearl in the center. Just gorgeous!

Art Deco Ring with bands of pinkish over 2.3 carats of African rubies, alternating with rose gold and Sterling silver - stunning with pearl center stone. Simply magical.

Stunning antique pink ruby ring set in gold - perfect for any era!
06/06/2024

Stunning antique pink ruby ring set in gold - perfect for any era!

Delightful antique Pink Ruby (approximately 1 cm long x .5cm wide) set in elegant yellow gold setting. Size 5, can be sized by a good jeweler.

Not great news for those of us in the Pacific NW....
05/20/2024

Not great news for those of us in the Pacific NW....

A warm winter has set certain parts of the state up for wildfire, but a shift to La NiƱa could balance things out.

New pieces about to hit the site - stay tuned!!!
05/17/2024

New pieces about to hit the site - stay tuned!!!

Gorgeous Art Deco cut glass crystal necklace.  Perfect for a wedding or special event.
03/15/2024

Gorgeous Art Deco cut glass crystal necklace. Perfect for a wedding or special event.

Elegant Art Deco era drop necklace features square cut and cabazon crystals. At the center is the large tear drop shaped crystal. Necklace measures 17"

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Seattle, WA

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Design Theory - Heirloom, modern jewelry + treasures created and curated by travelers and gem lovers. Pieces from 3000 BC to today! Design Theory has a special line of new and vintage engagement rings under $1000. Let us know if you have a special request or want to do layaway 800-710-2780 or [email protected] Facebook Store: http://www.facebook.com/designtheoryjewelry Online Store/Website: www.designtheoryjewelry.com Instagram: @designtheoryjewelry Twitter: @theoryjewelry Pinterest: @theoryjewelry