Gypsum was known in Old English as spærstān, "spear stone", referring to its crystalline projections. Thus, the word spar in mineralogy, by comparison to gypsum, refers to any non- ore mineral or …

Dec 11, 2025 · Gypsum, common sulfate mineral of great commercial importance, composed of hydrated calcium sulfate. It occurs in extensive beds associated with other evaporite minerals, …

What is Gypsum? Gypsum is an evaporite mineral most commonly found in layered sedimentary deposits in association with halite, anhydrite, sulfur, calcite, and dolomite.

May 2, 2018 · Gypsum (CaSO₄·2H₂O) is a soft sulfate mineral forming in evaporite basins, caves and volcanic settings. Learn its formation, properties, varieties, global deposits and major industrial uses.

Gypsum, a soft non-metallic mineral, almost exclusively forms in sedimentary settings, as seawater is evaporated or as dissolved ions precipitate from groundwater. Its mineral structure still contains …

Gypsum is a very common, soft sulfate mineral composed primarily of calcium sulfate dihydrate, with the chemical formula CaSO₄·2H₂O. Visually, it can be colorless or white, but impurities can also give it a …

A not-for-profit trade association founded in 1930, promoting the use of gypsum while advancing the development, growth, and general welfare of the gypsum industry in the United States and Canada …