amethysts is a form of:

Amethyst



noun
1.
(a precious stone, purple violet) កណ្ដៀងពណ៌ស្វាយ
ENGLISH MEANING
1.
A variety of crystallized quartz, of a purple or bluish violet color, of different shades. It is much used as a jeweler's stone.
2.
A purple color in a nobleman's escutcheon, or coat of arms.