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..., W. A., R. A. Howie and J. Zussman, ''An Introduction to the Rock Forming Minerals'', Logman, 1966, pp. 340–355 ISBN 0-582-44210-9</ref> ...ld, varieties of quartz have been, since antiquity, the most commonly used minerals in the making of [[jewelry]] and [[hardstone carving]]s.

| system = [[Monoclinic]]—prismatic H-M Symbol (2/m) [[Space group]] P2₁/a ...xide|(OH)]]₂. This green-colored mineral crystallizes in the [[monoclinic]] crystal system, and most often forms [[botryoidal]], fibrous, or [[stalag