botryoidal texture
mineralogy
Quick Summary
common crystals
Common crystal aggregations and habits.
Botryoidal texture describes a mineral's appearance as resembling a bunch of grapes. This is a type of crystal aggregation, where mineral grains grow together in rounded masses.12
Other descriptive terms for crystal aggregation include granular, lamellar, bladed, fibrous, acicular, radiating, globular, dendritic, mammillary, colloform, stalactitic, concentric, geode, and oolitic. Botryoidal forms are specifically noted as globular, resembling a bunch of grapes, and are included under the broader category of colloform textures.2
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