How to sign: a gemstone having the property of transmitting light without serious diffusion
Categories: gem, gemstone, stone
Within this category: amethyst, aquamarine, chalcedony, chrysolite, chrysoprase, citrine, diamond, emerald, garnet, hiddenite, kunzite, moonstone, morganite, peridot, ruby, sapphire, sunstone, topaz, tourmaline, water sapphire