botryoidal
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thumb|Botryoidal habit of gibbsite crystals
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thumb|Botryoidal habit of gibbsite crystals
A botryoidal ( ) texture or mineral habit, is one in which the mineral has an external form composed of many rounded segments, named for the Ancient Greek (), meaning "a bunch of grapes". This is a common form for many minerals, particularly hematite and malachite, which are known for frequently forming botryoidal masses. It is also a common form of goethite, smithsonite, fluorite, and chrysocolla.
Excerpted from Wikipedia’s “botryoidal” article, available under the CC BY-SA 4.0 licence.