Naturally-occurring Quartz. Also a style of engraving where all the engraved parts are polished, giving a more brilliant effect (developed in England during the 1880s & 1890s)
Transparent, colorless, crystal of Quartz.
A colorless water-clear form of quartz, rock crystal was believed by some ancient Greeks to be ice that had hardened over time into stone.
a clear quartz used in making electronic and optical equipment
A kind of quartz of transparant and neutral appearance, used before glass was developed to make household articles and ornaments.
Rock crystal is a transparent, crystalline mineral. Rock crystal is the purest form of quartz and a semi-precious stone.
A mineral; see also QUARTZ
Colourless and transparent form of quartz. Other colours of quartz have special names such as: Rose Quartz, Citrine, and Amethyst. Brown quartz is often referred to as Smokey Quartz. Smokey Quartz is often irradiated clear quartz.
Transparent colorless quartz sometimes referred to as "Herkimer diamonds."
One of the most common minerals of the earth's crust. The crystals are usually found as colorless hexagonal prisms with pyramidal ends.
Natural quartz, chemically pure silica. It is usually colorless (or nearly so). From earliest times, glassmakers sought to imitate it.
a colorless, transparent variety of quartz, used in optical instruments and as a semiprecious gemstone. [AHDOS
