GEM DATA — Mineral and Gemological Identification and Evaluation

Available Collection

Jewelry & Gemstone Gallery

A curated selection of fine jewelry, loose gemstones, and collectible pieces available for acquisition.

Fine jewelry collection — GEM DATA gallery
Diamond Solitaire Ring

Diamond Solitaire Ring

Available

Round brilliant-cut diamond, approximately 1.85 ct, set in platinum. GIA certified. Exceptional clarity and color.

1.85 ct Round Brilliant
Platinum Setting
GIA Certified
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Sapphire & Diamond Bracelet

Sapphire & Diamond Bracelet

Available

Natural Ceylon sapphires alternating with old European-cut diamonds. Circa 1920s, Art Deco platinum mount.

Natural Ceylon Sapphires
Art Deco, c. 1920s
Platinum Mount
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Emerald Cut Diamond

Emerald Cut Diamond

Available

Loose emerald-cut diamond, 3.12 ct, D color, VS1 clarity. GIA grading report included. Ideal for custom commission.

3.12 ct Emerald Cut
D / VS1
GIA Report Included
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Victorian Pearl Necklace

Victorian Pearl Necklace

Available

Natural pearl strand with diamond and gold clasp. Victorian era, exceptional luster and matching. Accompanied by appraisal documentation.

Natural Pearl Strand
Victorian Era
Diamond & Gold Clasp
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Burma Ruby Ring

Burma Ruby Ring

Available

Unheated Burma ruby, 2.04 ct, set in 18k yellow gold with diamond surround. AGL certificate confirming origin and no heat treatment.

2.04 ct Unheated Burma Ruby
18k Yellow Gold
AGL Certificate
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Art Deco Diamond Brooch

Art Deco Diamond Brooch

Available

Platinum and diamond brooch in geometric Art Deco design. Approximately 4.5 ct total diamond weight. Circa 1925.

~4.5 ct Total Diamond Weight
Platinum
Art Deco, c. 1925
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Vintage Archtop Guitar

Vintage Archtop Guitar

Available

A rare collectible archtop guitar of historical significance. Available for private viewing and acquisition consulting. Independent appraisal documentation provided.

Collectible Archtop
Historical Significance
Appraisal Documentation Available
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Inquire About a Piece

All items are available for private viewing at our appointment-only office in the historic Shreve Building, Union Square, San Francisco. Contact us to arrange a consultation.