A Lexicon of Cave and Karst Terminology with Special Reference to Environmental Karst Hydrology. Courtesy of the author & The Karst Waters Institute. 2002.
Selenite — This article is about the mineral: for other meanings, see Selenite (disambiguation). Selenite, satin spar, desert rose, and gypsum flower are four varieties of gypsum; all four varieties show obvious crystalline structure. The four crystalline… … Wikipedia
Charles Wheatstone — Wheatstone, drawn by Samuel Laurence in 1868 Born 6 … Wikipedia
Spar (mineralogy) — Spar is a term that is used to refer to a category of crystals that have readily discernible faces. Crystallized, earthy, and some metallic, a spar will easily break into rhomboidal, cubical, or laminated fragments with polished surfaces, but… … Wikipedia
gypsum — 1. White or colorless mineral or rock composed of the hydrated calcium sulfate, CaSO4●2H2O. Gypsum rock is an evaporite precipitated from sea water and is therefore soluble in water and may contain dissolutional caves. Mineral gypsum is formed … Lexicon of Cave and Karst Terminology
