PGI can test for up to 31 types of gemstones and their
ranges of individual thermal conductivity readings based
on the analogue to digital (ADC) values illustrated in Fig.
3.3.
References:
1) Almandine, Pyrope & Spessartite
2) Aventurine, Amethyst, Brown Quartz, Citrine,
Colorless Quartz
3) Hessonite, Tsavorite & Demantoid
4) Paraiba, Rubellite & Other colors of Tourmaline
5) Goshenite, Helidor, Aquamarine, Morganite & Emerald
Fig. 3.3
Note: The graph is not drawn to scale.
Thermal Conductivity Value (ADC)
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