Lustre.
Reading edition
Well polished precious stones display a decided lustre, which assists in determining their species.
The following is a list of some precious stones and their lustre:
Adamantine.—Diamond, zircon.
Resinous.—Garnet.
Vitreous.—Emerald, ruby, spinel.
Waxy.—Turquois.
Pearly.—Moonstone, opal.
Silky.—Crocidolite, quartz cat’s-eye.
Metallic.—Hematite.
Greasy.—Olivine.
Some stones vary in lustre, from vitreous to pearly, etc.