Sentence Examples with the word amethystine

Veins of amethystine quartz are apt to lose their colour on the exposed outcrop.

Amethystinum, 2 ft., has the upper part of the stem, the bracts, and heads of flowers all of an amethystine blue.

Purple corundum, or sapphire of amethystine tint, is called Oriental amethyst, but this expression is often applied by jewellers to fine examples of the ordinary amethystine quartz, even when not derived from Eastern sources.