from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A mineral, a basic calcium, aluminium and iron aluminosilicate, which occurs in stalagtitic aggregates or curved crystals, Ca2Al2Si3O10(OH)2.
from the GNU version of the Collaborative International Dictionary of English
- n. A pale green mineral occurring in crystalline aggregates having a botryoidal or mammillary structure, and rarely in distinct crystals. It is a hydrous silicate of alumina and lime.
from The Century Dictionary and Cyclopedia
- A mineral, usually of a pale-green color and vitreous luster, commonly occurring in botryoidal or globular forms with crystalline surface.
The best specimens are afforded by the beautifully developed transparent glassy crystals, found with albite, prehnite and quartz, in a zone of amphibolite and chlorite-schists at Le Bourg d'Oisans in Dauphiné.
The art that softens life's hard edges for Bowes comes from rock and metal, from agates, prehnite, jasper, tourmalinated quartz and silver, which she cuts and hand forges into jewelry.
-- "By the way, I received from Dr. Torrey a curious mixture of petrosilex and prehnite in radiating crystals, which was sent him by you, and collected at the West.
_ -- "By the way, I received from Dr. Torrey a curious mixture of petrosilex and prehnite in radiating crystals, which was sent him by you, and collected at the West.