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Our San Francisco store is temporarily closed while we renovate our new space next door. We plan to re-open Friday, May 23rd.

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M & Co. Pear Diamond Bypass RingM & Co. Pear Diamond Bypass Ring
M & Co. Multi-Shape Lab Diamond Band RingM & Co. Multi-Shape Lab Diamond Band Ring
M & Co. East West Wide Oval Diamond RingM & Co. East West Wide Oval Diamond Ring
M & Co. White Gold Pavé Lab Diamond Full Eternity BandM & Co. White Gold Pavé Lab Diamond Full Eternity Band
Metal
M & Co. Emerald Cut Engagement Ring with Cadillac AccentsM & Co. Emerald Cut Engagement Ring with Cadillac Accents
M & Co. Marquise Engagement Ring with Tapered BaguettesM & Co. Marquise Engagement Ring with Tapered Baguettes
M & Co. Pear & Emerald Toi et Moi Lab Grown Diamond RingM & Co. Pear & Emerald Toi et Moi Lab Grown Diamond Ring
M & Co. Yellow Gold Pavé Lab Diamond Full Eternity BandM & Co. Yellow Gold Pavé Lab Diamond Full Eternity Band
Metal
M & Co. Yellow Gold Pavé Lab Diamond Half Eternity BandM & Co. Yellow Gold Pavé Lab Diamond Half Eternity Band
Metal
M & Co. Gemstone & Diamond Half Eternity BandsM & Co. Gemstone & Diamond Half Eternity Bands
Metal
Blue Topaz Half-Eternity Band
Metal
M & Co. Oval Lab Grown Diamond Engagement Ring with Half Moon AccentsM & Co. Oval Lab Grown Diamond Engagement Ring with Half Moon Accents
M & Co. 5 CT Emerald Cut Bezel Solitaire Lab Grown Diamond Ring
Rainbow Sapphire 2MM Eternity Ring
Rainbow Sapphire Baguette Eternity Ring
Rainbow Sapphire Round Millegrain Bezel Eternity Ring
Turquoise Ring 18k goldTurquoise Ring 18k gold
Turquoise Ring 18k gold Sale price$1,450.00
Victorian Moonstone RingVictorian Moonstone Ring
Victorian Moonstone Ring Sale price$975.00
Sold out18k Bezel Set no heat Ruby Cabochon Ring
Midcentury Fire Opal RingMidcentury Fire Opal Ring
Midcentury Fire Opal Ring Sale price$1,500.00
Alternating Citrine & Diamond Half-Eternity Band RingAlternating Citrine & Diamond Half-Eternity Band Ring
Metal
Alternating Blue Topaz & Diamond Half-Eternity Band RingAlternating Blue Topaz & Diamond Half-Eternity Band Ring
Metal
Alternating Alexandrite & Diamond Half-Eternity Band RingAlternating Alexandrite & Diamond Half-Eternity Band Ring
Metal
Alternating Amethyst & Diamond Band RingAlternating Amethyst & Diamond Band Ring
Metal
M & Co. White Gold Shared Prong Lab Diamond Full Eternity BandM & Co. White Gold Shared Prong Lab Diamond Full Eternity Band
M & Co. White Gold Shared Prong Lab Diamond Half Eternity BandM & Co. White Gold Shared Prong Lab Diamond Half Eternity Band
M & Co. White Gold Pavé Lab Diamond Half Eternity BandM & Co. White Gold Pavé Lab Diamond Half Eternity Band
Metal
M & Co. East-West Oval Diamond Engagement RingM & Co. East-West Oval Diamond Engagement Ring
Metal
M & Co. 3.06 CT Oval Cut Halo Solitaire Lab Grown Diamond RingM & Co. 3.06 CT Oval Cut Halo Solitaire Lab Grown Diamond Ring
M & Co. 3.02 CT Emerald Cut Hidden Halo Solitaire Lab Grown Diamond RingM & Co. 3.02 CT Emerald Cut Hidden Halo Solitaire Lab Grown Diamond Ring
M & Co. Yellow Gold Shared Prong Lab Diamond Half Eternity BandM & Co. Yellow Gold Shared Prong Lab Diamond Half Eternity Band
Metal
Save 55%Edwardian Style Emerald & Diamond Cocktail RingEdwardian Style Emerald & Diamond Cocktail Ring
Edwardian Style Emerald & Diamond Cocktail Ring Sale price$12,000.00 Regular price$26,500.00
Jade Band Size 9.25Jade Band Size 9.25
Jade Band Size 9.25 Sale price$300.00
Jade Band Size 13Jade Band Size 13
Jade Band Size 13 Sale price$250.00
18k Modern Mexican Fire Opal Ring18k Modern Mexican Fire Opal Ring
Sold outSave 57%Art Deco Style Platinum Diamond & Sapphire Halo RingArt Deco Style Platinum Diamond & Sapphire Halo Ring
Art Deco Style Platinum Diamond & Sapphire Halo Ring Sale price$2,000.00 Regular price$4,650.00
M & Co. 3 CT Emerald Cut with Epaulette Accents Three Stone RingM & Co. 3 CT Emerald Cut with Epaulette Accents Three Stone Ring
Vintage David Webb 18k Yellow Gold  Pyramidal Hammered RingVintage David Webb 18k Yellow Gold  Pyramidal Hammered Ring
Save 48%GIA 15.36 CT Color Change Sri-Lankan SapphireGIA 15.36 CT Color Change Sri-Lankan Sapphire
GIA 15.36 CT Color Change Sri-Lankan Sapphire Sale price$75,000.00 Regular price$145,000.00
Platinum Natural Green Jadeite Jade (16x12mm) & OMC Diamond (1.25cttw) Ring Sz 6.25Platinum Natural Green Jadeite Jade (16x12mm) & OMC Diamond (1.25cttw) Ring Sz 6.25
Save 52%Platinum 3.09ct AGL Unheated Burmese Pear Shaped Ruby & Diamond (0.60ct) Ring Sz 4.5Platinum 3.09ct AGL Unheated Burmese Pear Shaped Ruby & Diamond (0.60ct) Ring Sz 4.5
Platinum Art Deco Natural Freshwater Pearl (10.9mm GIA) & Diamond (0.18cttw) Ring Sz 4.5Platinum Art Deco Natural Freshwater Pearl (10.9mm GIA) & Diamond (0.18cttw) Ring Sz 4.5
Edwardian Platinum Demantoid Garnet (0.8cttw) & Diamond (0.40cttw) Hexagonal Ring Sz 7
Edwardian 3 Stone Yogo Gulch Sapphire & Diamond Stoplight RingEdwardian 3 Stone Yogo Gulch Sapphire & Diamond Stoplight Ring
Edwardian Platinum Pearl Filigree RingEdwardian Platinum Pearl Filigree Ring
Save 41%Platinum Pink Emerald Cut Tourmaline (15.31ct) & Diamond (0.40cttw) Ring Sz 7.25
Save 60%18k Yellow Gold Karl Stittgen Moonstone Cabochon Ring 10.9gr Sz 6