Hallmarks & Metal Purity
British Sterling Silver 925 Hallmarks Identification Guide
Learn how to decode British sterling silver hallmarks, identify the Lion Passant, town marks (London, Birmingham, Sheffield), and date letters from 1700 to present.
📱 Official iOS App & Gemology Guides
Identify, Authenticate & Appraise Fine Jewelry
Decode gold karat stamps, spot authentic Art Deco filigree, verify antique hallmarks, and research gemstone valuations with our iOS App and expert research guides.
Featured Identification Guides
Hallmarks & Metal Purity
Gold Purity Stamps & Karat Hallmarks Identification Guide
Comprehensive guide to decoding gold hallmarks, karat stamps (10k, 14k, 18k, 24k, 585, 750), maker's marks, and testing techniques for antique and fine jewelry.
Vintage Rings
Art Deco Engagement Ring Authentication & Identification Guide
Learn how to identify authentic 1920s-1930s Art Deco engagement rings, spot geometric filigree, old European cut diamonds, platinum marks, and reproductions.
Carved Gems & Cameos
Antique Cameo Jewelry Identification & Value Guide
Learn how to identify genuine shell, hardstone, coral, and glass cameos, evaluate carved portrait details, date hardware clasps, and spot molded plastic fakes.
📱 Official iOS App
Download The Jewelry Appraisal iOS App
Scan hallmarks, identify gemstones, and appraise antique & fine jewelry instantly on your iPhone & iPad with AI.
Download on the App StoreFree Download • Designed for iPhone & iPad