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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. Pear Diamond Bypass Ring Sale price$975.00
M & Co. Multi-Shape Lab Diamond Band RingM & Co. Multi-Shape Lab Diamond Band Ring
M & Co. Multi-Shape Lab Diamond Band Ring Sale price$2,500.00
M & Co. East West Wide Oval Diamond RingM & Co. East West Wide Oval Diamond Ring
M & Co. East West Wide Oval Diamond Ring Sale price$950.00
M & Co. White Gold Pavé Lab Diamond Full Eternity BandM & Co. White Gold Pavé Lab Diamond Full Eternity Band
M & Co. White Gold Pavé Lab Diamond Full Eternity Band Sale priceFrom $800.00
Metal
M & Co. Emerald Cut Engagement Ring with Cadillac AccentsM & Co. Emerald Cut Engagement Ring with Cadillac Accents
M & Co. Emerald Cut Engagement Ring with Cadillac Accents Sale price$2,800.00
M & Co. Marquise Engagement Ring with Tapered BaguettesM & Co. Marquise Engagement Ring with Tapered Baguettes
M & Co. Marquise Engagement Ring with Tapered Baguettes Sale price$2,500.00
M & Co. Pear & Emerald Toi et Moi Lab Grown Diamond RingM & Co. Pear & Emerald Toi et Moi Lab Grown Diamond Ring
M & Co. Pear & Emerald Toi et Moi Lab Grown Diamond Ring Sale price$1,750.00
M & Co. Yellow Gold Pavé Lab Diamond Full Eternity BandM & Co. Yellow Gold Pavé Lab Diamond Full Eternity Band
M & Co. Yellow Gold Pavé Lab Diamond Full Eternity Band Sale priceFrom $800.00
Metal
M & Co. Yellow Gold Pavé Lab Diamond Half Eternity BandM & Co. Yellow Gold Pavé Lab Diamond Half Eternity Band
M & Co. Yellow Gold Pavé Lab Diamond Half Eternity Band Sale priceFrom $950.00
Metal
M & Co. Gemstone & Diamond Half Eternity BandsM & Co. Gemstone & Diamond Half Eternity Bands
M & Co. Gemstone & Diamond Half Eternity Bands Sale price$1,200.00
Metal
Blue Topaz Half-Eternity Band
Blue Topaz Half-Eternity Band Sale price$630.00
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. Oval Lab Grown Diamond Engagement Ring with Half Moon Accents Sale price$3,200.00
M & Co. 5 CT Emerald Cut Bezel Solitaire Lab Grown Diamond Ring
M & Co. 5 CT Emerald Cut Bezel Solitaire Lab Grown Diamond Ring Sale price$3,950.00
Rainbow Sapphire 2MM Eternity Ring
Rainbow Sapphire 2MM Eternity Ring Sale price$1,870.00
Rainbow Sapphire Baguette Eternity Ring
Rainbow Sapphire Baguette Eternity Ring Sale price$3,300.00
Rainbow Sapphire Round Millegrain Bezel Eternity Ring
Rainbow Sapphire Round Millegrain Bezel Eternity Ring Sale price$3,100.00
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
18k Bezel Set no heat Ruby Cabochon Ring Sale price$3,650.00
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
Alternating Citrine & Diamond Half-Eternity Band Ring Sale price$1,200.00
Metal
Alternating Blue Topaz & Diamond Half-Eternity Band RingAlternating Blue Topaz & Diamond Half-Eternity Band Ring
Alternating Blue Topaz & Diamond Half-Eternity Band Ring Sale price$1,200.00
Metal
Alternating Alexandrite & Diamond Half-Eternity Band RingAlternating Alexandrite & Diamond Half-Eternity Band Ring
Alternating Alexandrite & Diamond Half-Eternity Band Ring Sale price$1,900.00
Metal
Alternating Amethyst & Diamond Band RingAlternating Amethyst & Diamond Band Ring
Alternating Amethyst & Diamond Band Ring Sale price$1,200.00
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 Full Eternity Band Sale priceFrom $950.00
Metal
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 Shared Prong Lab Diamond Half Eternity Band Sale priceFrom $950.00
Metal
M & Co. White Gold Pavé Lab Diamond Half Eternity BandM & Co. White Gold Pavé Lab Diamond Half Eternity Band
M & Co. White Gold Pavé Lab Diamond Half Eternity Band Sale priceFrom $950.00
Metal
M & Co. East-West Oval Diamond Engagement RingM & Co. East-West Oval Diamond Engagement Ring
M & Co. East-West Oval Diamond Engagement Ring Sale price$2,750.00
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. 3.06 CT Oval Cut Halo Solitaire Lab Grown Diamond Ring Sale price$2,950.00
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. 3.02 CT Emerald Cut Hidden Halo Solitaire Lab Grown Diamond Ring Sale price$2,650.00
M & Co. Yellow Gold Shared Prong Lab Diamond Half Eternity BandM & Co. Yellow Gold Shared Prong Lab Diamond Half Eternity Band
M & Co. Yellow Gold Shared Prong Lab Diamond Half Eternity Band Sale priceFrom $950.00
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
18k Modern Mexican Fire Opal Ring Sale price$2,800.00
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
M & Co. 3 CT Emerald Cut with Epaulette Accents Three Stone Ring Sale price$3,800.00
Vintage David Webb 18k Yellow Gold Pyramidal Hammered RingVintage David Webb 18k Yellow Gold Pyramidal Hammered Ring
Vintage David Webb 18k Yellow Gold Pyramidal Hammered Ring Sale price$16,500.00
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
Platinum Natural Green Jadeite Jade (16x12mm) & OMC Diamond (1.25cttw) Ring Sz 6.25 Sale price$7,500.00
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 3.09ct AGL Unheated Burmese Pear Shaped Ruby & Diamond (0.60ct) Ring Sz 4.5 Sale price$55,000.00 Regular price$115,000.00
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
Platinum Art Deco Natural Freshwater Pearl (10.9mm GIA) & Diamond (0.18cttw) Ring Sz 4.5 Sale price$7,500.00
Platinum Oval Sri-Lankan Ruby (Heat GIA 3.51ct) & Diamond (1.5cttw) Ring Sz 4.25 Sale price$10,000.00 Regular price$23,500.00
Edwardian Platinum Demantoid Garnet (0.8cttw) & Diamond (0.40cttw) Hexagonal Ring Sz 7
Edwardian Platinum Demantoid Garnet (0.8cttw) & Diamond (0.40cttw) Hexagonal Ring Sz 7 Sale price$3,500.00
Edwardian 3 Stone Yogo Gulch Sapphire & Diamond Stoplight RingEdwardian 3 Stone Yogo Gulch Sapphire & Diamond Stoplight Ring
Edwardian 3 Stone Yogo Gulch Sapphire & Diamond Stoplight Ring Sale price$14,500.00
Edwardian Platinum Pearl Filigree RingEdwardian Platinum Pearl Filigree Ring
Edwardian Platinum Pearl Filigree Ring Sale price$7,850.00
Save 41%Platinum Pink Emerald Cut Tourmaline (15.31ct) & Diamond (0.40cttw) Ring Sz 7.25
Platinum Pink Emerald Cut Tourmaline (15.31ct) & Diamond (0.40cttw) Ring Sz 7.25 Sale price$8,500.00 Regular price$14,500.00
Save 60%18k Yellow Gold Karl Stittgen Moonstone Cabochon Ring 10.9gr Sz 6
18k Yellow Gold Karl Stittgen Moonstone Cabochon Ring 10.9gr Sz 6 Sale price$1,300.00 Regular price$3,250.00