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 36 years we have developed a four point system that are the criteria for the issuance of Certifications of Authenticity….

2. 1. Examination of gemstone: Hardness test, Microscope test, Density test (if needed).

Calcification test, and Patina test.

4. 2. Provenance of gemstone: Ascertaining the type of Jade and Origin of source of gemstone.

6. 3. Examination of workmanship: Carving technique, Depth of incised and relief lines, and Techniques employed in use of abrasives and tools employed.

8. 4. Examination of art style: Design and style of Motifs, Shape/Form, and Comparison to contemporary specimens.

9. 

TESTING CRITERIA AUTHENTICITY OF ANCIENT ARTIFACTS

Each classification of artifacts has their own criteria for testing for authenticity.  We have developed testing criteria for specialized types of artifacts that we have collected over the decades. Each artifact is issued a Certification of Authenticity that is based upon our best knowledge and these criteria….

1. 1. Porcelains: Thermo luminescence Test 

3. 2. Paintings: Testing of Pigmentation and Examination of paper or canvas under high magnification.

5. 3. Keris Meteorite Swords: Metallurgical testing, examination of metallurgy folding and examination of Pamor.

7. 4. Ancient Ivory: Examination of patina and Ivory grain, with focus on artistic styles.

9. 5. Ancient Beads: Examination of Tool Signatures, Patina, Aging of Stone, and Mineralization