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No indication of treatment.

No gemological constraints (for instance no altered inclusions) are present which would indicate that a heat enhancement process was applied.

Indication of treatment. (H).

(H). gemstone subjected only to thermal treatment, which changed its physical properties, including the degree of transparency and color and will always be mentioned on the report.

Indication of treatment. (H) “beeswax.”

(H) “beeswax.”. Amber samples were subjected to heat treatment experiments aimed at reproducing heated products found in the jewelry market today. Using a furnace and applying specific conditions, the authors produced four types of heated amber:

Enhanced by treatment. H (P).

H (P). Enhanced by treatment– many pieces pressed in high temperature and under high pressure without additional components and will always be mentioned on the report.

Assembled Amber.

(Assembled Amber).– gemstone consisting of two or more parts of natural, modified or reconstructed amber bonded together with the use of the smallest possible amount of a binding agent necessary to form a single pieces and will always be mentioned on report.