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Botryoidal identification and geology

A crystal habit in which a mineral forms smooth, rounded, grape-like masses composed of radiating crystal fibers growing from multiple nucleation points. The term describes an external morphology, not a crystal system. Botryoidal surfaces are typically smooth and have a bubbly or lumpy appearance. Field: mineralogy. Example: Malachite commonly displays a vivid green botryoidal habit with concentric banding visible on cut surfaces, formed by precipitation from copper-bearing solutions in the oxidation zones of copper deposits.. Related terms: Crystal habit, Reniform, Mammillary, Colloform.

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Sources, scope & corrections

These authoritative resources support category-level nomenclature, terminology, identification methods, and safety. When a specimen-specific safety warning appears, the public-health source listed here directly supports that precaution. They are not line-by-line citations for every other property on this entry, and natural specimens vary.

Editorial owner
GeoMiner
Last updated
2026-03-30T15:19:41.970235+00:00
Review status
Published; not independently peer-reviewed
  • USGS Thesaurus — U.S. Geological Survey. Controlled earth-science terminology used to describe USGS information resources.
  • Glossary of Geologic Terms — U.S. National Park Service. Geologic definitions prepared by the NPS Geologic Resources Inventory.

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Common questions

What does Botryoidal mean in geology?
A crystal habit in which a mineral forms smooth, rounded, grape-like masses composed of radiating crystal fibers growing from multiple nucleation points. The term describes an external morphology, not a crystal system. Botryoidal surfaces are typically smooth and have a bubbly or lumpy appearance.
What is an example of Botryoidal?
Malachite commonly displays a vivid green botryoidal habit with concentric banding visible on cut surfaces, formed by precipitation from copper-bearing solutions in the oxidation zones of copper deposits.
Which earth-science field uses the term Botryoidal?
Botryoidal is used in mineralogy.
Which terms are related to Botryoidal?
Related terms in this reference are Crystal habit, Reniform, Mammillary, Colloform.

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