Demantoid is a type of andradite mineral, which is a part of the garnet group. It’s the rarest and the most expensive type of garnets.
The color of Demantoid garnet is green, often with yellowish or brownish tints, rarely with a blue tint. Its coloration is caused by impurities of iron and chromium, yellow tints are caused by titanium compounds. The most valuable color is a deep vivid green without any hint of yellowness.
Demantoid has a wide range of colors and to simplify the matters we group them into five color grades.
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