Ettringite specimens for sale

Ettringite is a hydrated calcium aluminum sulfate mineral that forms in large, often fibrous to platy aggregates. It commonly occurs in colorless to pale white hues and exhibits a vitreous to resinous luster, sometimes forming delicate prisms or needles within secondary hydrothermal assemblages. Typical localities such as South Africa, Germany, and Israel are known for well-formed specimens that highlight its intricate crystal habits and association with other sulfate minerals. Collectors prize ettringite for its distinctive habit, its rarity in crystal form, and the mineral’s associations with phosphate and sulfide minerals in oxidized zones and cement-related environments.