Beautiful Demantoid Garnet (Andradite) from Antetetezambato, Ambanja District, Antsiranana Province, Madagascar
This is a beautiful thumbnail size Demantoid Garnet (Andradite) from Antetetezambato, Ambanja District, Antsiranana Province, Madagascar
Dimensions: 2cm (0.7”) x 2cm (0.7”)
Perky Display Dimensions: 3.5cm (1.3) x 3.5cm (1.3”)
Weight: 7.1 grams
Evidence of Rainbow inside crystal (See photos for reference)
Demantoid is the green gemstone variety of the mineral andradite, a member of the garnet group of minerals. Andradite is a calcium- and iron-rich garnet
the chemical formula for Demantoid Garnet is:
With chromium substitution as the cause of the demantoid green color. Ferric iron is the cause of the yellow in the stone.
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