PRESIDIUM Gem Indicator PGI Manual Del Usuario página 11

References:
1) Almandine Garnet, Pyrope Garnet, Spessartite Garnet
2) Aventurine, Citrine, Amethyst, Colorless Quartz,
Brown Quartz, Black Quartz
3) Hessonite, Tsavorite, Demantoid
4) Tourmaline, Paraiba, Rubellite
5) Aquamarine, Morganite, Emerald, Goshenite, Helidor
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