coccolite

A variety of augite or pyroxene; called by Hauy, granuliform pyroxene. Its color is usually some shade of green. It is composed of granular distinct concretions, easily separable, some of which present the appearance of crystals whose angles and edges have been obliterated. Cocculus Indicus, the fruit of the Menispermum cocculus, a poisonous berry, often used in adulterating malt liquors.