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DJR Expert Guide Series, Vol. 516 — Master Guide to Authentication of Amber, Jade & Organic Gemstones
Amber, jade, and organic gemstones—coral, ivory, tortoiseshell, jet, horn, bone, and pearl—are among the most commonly forged materials in jewelry, antiquities, and ethnographic collections. Because these materials come from biological or geological origins, genuine examples show structural patterns, inclusions, luster behavior, and natural irregularities that synthetic materials and treated stones rarely reproduce. Forgeries today include polymer composites, dyed stones, pressed resins, reconstructed jade, bonded amber, staged inclusions, and heat-aged substitutes.
DJR Expert Guide Series, Vol. 516 provides a complete, non-destructive workflow for evaluating amber, jade, and organic gemstone materials safely and professionally. This guide explains how to analyze internal structure, assess surface morphology, evaluate color distribution, identify inclusions, recognize dye and polymer treatments, interpret UV fluorescence, and use magnification and sidelight to detect red flags.
Inside this Master Guide, you’ll learn how experts:
Distinguish Baltic, Dominican, and Burmese amber using flow structure and fluorescence
Identify plastic, glass, copal, and pressed amber imitations
Evaluate authentic vs. staged insect and debris inclusions
Distinguish jadeite from nephrite through granular vs. fibrous internal structure
Detect dyed, polymer-impregnated, glass-filled, and reconstituted jade
Analyze carving tool marks to distinguish modern rotary tools from period carving
Authenticate coral, tortoiseshell, ivory, jet, horn, bone, and pearls using visual indicators
Recognize Schreger lines, nacre layering, natural pores, and organic growth patterns
Use magnification, UV behavior, translucency, and weight clues safely
Apply a complete non-destructive authentication workflow to gemstone evaluation
Whether evaluating amber jewelry, carved jade figures, coral beads, ivory objects, tortoiseshell inlay, or natural pearls, this guide provides collectors, dealers, museums, and appraisers with the professional methodology needed to distinguish authentic organic gemstone materials from modern synthetics and treated forgeries.
Digital Download — PDF • 9 Pages • Instant Access
Amber, jade, and organic gemstones—coral, ivory, tortoiseshell, jet, horn, bone, and pearl—are among the most commonly forged materials in jewelry, antiquities, and ethnographic collections. Because these materials come from biological or geological origins, genuine examples show structural patterns, inclusions, luster behavior, and natural irregularities that synthetic materials and treated stones rarely reproduce. Forgeries today include polymer composites, dyed stones, pressed resins, reconstructed jade, bonded amber, staged inclusions, and heat-aged substitutes.
DJR Expert Guide Series, Vol. 516 provides a complete, non-destructive workflow for evaluating amber, jade, and organic gemstone materials safely and professionally. This guide explains how to analyze internal structure, assess surface morphology, evaluate color distribution, identify inclusions, recognize dye and polymer treatments, interpret UV fluorescence, and use magnification and sidelight to detect red flags.
Inside this Master Guide, you’ll learn how experts:
Distinguish Baltic, Dominican, and Burmese amber using flow structure and fluorescence
Identify plastic, glass, copal, and pressed amber imitations
Evaluate authentic vs. staged insect and debris inclusions
Distinguish jadeite from nephrite through granular vs. fibrous internal structure
Detect dyed, polymer-impregnated, glass-filled, and reconstituted jade
Analyze carving tool marks to distinguish modern rotary tools from period carving
Authenticate coral, tortoiseshell, ivory, jet, horn, bone, and pearls using visual indicators
Recognize Schreger lines, nacre layering, natural pores, and organic growth patterns
Use magnification, UV behavior, translucency, and weight clues safely
Apply a complete non-destructive authentication workflow to gemstone evaluation
Whether evaluating amber jewelry, carved jade figures, coral beads, ivory objects, tortoiseshell inlay, or natural pearls, this guide provides collectors, dealers, museums, and appraisers with the professional methodology needed to distinguish authentic organic gemstone materials from modern synthetics and treated forgeries.
Digital Download — PDF • 9 Pages • Instant Access