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colloform texture
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A diagram displays illustrations of various common crystal aggregations and habits in minerals, including granular, lamellar, bladed, fibrous, acicular, radiating, dendritic, mammillated, colloform, stalactitic, geode, and oolitic forms, each labeled with mineral examples.
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colloform texture

mineralogy
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A diagram displays illustrations of various common crystal aggregations and habits in minerals, including granular, lamellar, bladed, fibrous, acicular, radiating, dendritic, mammillated, colloform, stalactitic, geode, and oolitic forms, each labeled with mineral examples.
common crystals Common crystal aggregations and habits.

Colloform describes a mineral's shape, specifically resembling a colloidal deposit. This texture is characterized by rounded, often banded formations, similar to botryoidal or mammillary shapes. It is a type of crystal aggregation, distinct from well-formed single crystals. Colloform textures include spherical forms composed of radiating individuals, encompassing botryoidal, reniform, and mammillary forms.12

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3 Britannica Sources
  1. colloform
  2. mineral - Crystal habit and crystal aggregation
  3. mineral - Lustre

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