n. A violet-blue or purple variety of quartz, the color being perhaps due to the presence of peroxid of iron.n. In heraldry, the color purple when described in blazoning a nobleman's escutcheon. See tincture.n. The name of a humming-bird, Calliphlox amethystina.n. A trade-name for certain artificial dyes of the azine class, as tetramethyl safranine and tetra-amyl safranine.