concentric texture

mineralogy

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June 17, 2026

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In mineralogy, a concentric texture describes roughly spherical layers arranged around a common center. This texture is observed in minerals like agate and within geodes, which are rock cavities lined with mineral material. These layers form due to successive depositions of material. Concentric textures can also refer to successive shells within individual crystals that differ in composition, reflecting changes in conditions during crystal growth. This textural feature provides insights into the geological processes and history of the mineral's formation.123

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mineral
Crystal habit and crystal aggregation
…cylinders or cones resembling icicles; concentric, roughly spherical layers arranged about a common centre, as in agate and in geodes; geode, a partially filled rock cavity lined by mineral material (geodes may be banded as in agate owing to successive depositions of material, and the inner surface is often covered…
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…cylinders or cones resembling icicles; concentric, roughly spherical layers arranged about a common centre, as in agate and in geodes; geode, a partially filled rock cavity lined by mineral material (geodes may be banded as in agate owing to successive depositions of material, and the inner surface is often covered…
Read More