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Botryogen :: Botryogen (n.) A hydrous sulphate of iron of a deep red color. It often occurs in botryoidal form.

Botryoid :: Botryoid (a.) Alt. of Botryoida.

Fiorite :: Fiorite (n.) A variety of opal occuring in the cavities of volcanic tufa, in smooth and shining globular and botryoidal masses, having a pearly luster; -- so called from Fiora, in Ischia..

Botryoidal :: Botryoidal (a.) Having the form of a bunch of grapes; like a cluster of grapes, as a mineral presenting an aggregation of small spherical or spheroidal prominences..

Botryolite :: Botryolite (n.) A variety of datolite, usually having a botryoidal structure..

Prehnite :: Prehnite (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..

Turquois :: Turquois (n.) A hydrous phosphate of alumina containing a little copper; calaite. It has a blue, or bluish green, color, and usually occurs in reniform masses with a botryoidal surface..

Psilomelane :: Psilomelane (n.) A hydrous oxide of manganese, occurring in smooth, botryoidal forms, and massive, and having an iron-black or steel-gray color..

Smithsonite :: Smithsonite (n.) Native zinc carbonate. It generally occurs in stalactitic, reniform, or botryoidal shapes, of a white to gray, green, or brown color. See Note under Calamine..

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