(metallurgy). To separate a metal or a mineral from an ore by various chemical or mechanical methods. (pharmacology). A pharmaceutical preparation obtained by dissolving the active constituents of a drug with a suitable menstruum, evaporating the solvent, and adjusting to prescribed standards.
Tibetans consider amethyst sacred to the Buddha and make prayer beads from it. Amethyst is considered the birthstone of February. In the Middle Ages, it was considered a symbol of royalty and used to decorate English regalia.
For other meanings of the word, see Amethyst (disambiguation). The colour amethyst is a moderate, transparent purple. It is also known as a deep shade of lavender. Its name is from the stone amethyst.This stone is a form of quartz but it is not always purple.or other meanings of the word, see Amethyst (disambiguation). The colour amethyst is a moderate, transparent purple. It is also known as a deep shade of lavender. Its name is from the stone amethyst.