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TESTING CRITERIA
CRITERIA FOR AUTHENTICITY
Ancient jades are a classification of gemstone artifacts that must be evaluated by experts who use Scientific,
Historic and Mineralogical methods. Currently there are no scientifically proven
methods to date ancient jades with precise accuracy, so Jade experts must analyze jade
gemstone
material, natural gemstone erosion, material wear /leaching, carving methods, tool marks and artistic styles
to determine age and authenticity.
Over the past 34 years
we have developed a four point system
that are the criteria for the issuance of Certifications of Authenticity….
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1.
Examination of
gemstone: Hardness test, Microscope test, Density test (if
needed).
Calcification test, and Patina test.
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2.
Provenance of gemstone:
Ascertaining the type of Jade and Origin of source of gemstone.
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3.
Examination of
workmanship: Carving technique, Depth of incised and relief lines, and Techniques
employed in use of abrasives and tools employed.
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4.
Examination of
art style: Design and style of Motifs, Shape/Form, and Comparison to contemporary
specimens.
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TESTING CRITERIA
AUTHENTICITY OF
ANCIENT ARTIFACTS
Each
classification of artifacts has their own criteria for testing for
authenticity. We have developed
different testing criteria to issue Certifications of
Authenticity that are based on our best knowledge….
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1. Porcelains: Thermo luminescence Test
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2. Paintings: Testing of
Pigmentation and Examination of paper or canvas under high
magnification.
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3.
Keris Meteorite Swords:
Metallurgical testing, examination of metallurgy folding and examination of Pamor.
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4.
Ancient Ivory:
Examination of patina and Ivory grain, with focus on artistic
styles.
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5.
Ancient Beads: Examination of Tool Signatures, Patina,
Aging of Stone, and Mineralization
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