How can you identify Analcime?

Compare several properties rather than relying on colour alone. This entry records colour: Colorless, white, gray, pinkish; lustre: Vitreous; streak: White; Mohs hardness: 5-5.5; cleavage: Poor; crystal system: Isometric Cubic; transparency: Transparent to translucent. Confirm an important identification with additional field tests or qualified laboratory work.

What is Analcime commonly confused with?

Analcime may be confused with Leucite, Garnet, Chabazite. Compare multiple diagnostic properties because colour and surface appearance can overlap.

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Analcime identification and geology

Hydrated sodium aluminum silicate zeolite/feldspathoid forming distinctive trapezohedral crystals. Also spelled analcite. Color: Colorless, white, gray, pinkish. Luster: Vitreous. Streak: White. Cleavage: Poor. Hardness: 5-5.5. Transparency: Transparent to translucent. Crystal system: Isometric Cubic. Chemical formula: NaAlSi₂O₆·H₂O. Specific gravity: 2.22-2.29. Formation: Forms in basalt cavities from hydrothermal fluids, and as a primary mineral in some alkaline igneous rocks. Common geological settings: Italy, Iceland, USA, India; found in basalt vesicles and alkaline igneous rocks. Common look-alikes and related entries: Leucite, Garnet, Chabazite.

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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: 2026-03-30T14:37:15.003782+00:00
Review status: Published; not independently peer-reviewed

IMA–CNMNC List of Mineral Names — International Mineralogical Association. Official mineral-name, nomenclature, and classification records.
Mineral ID Key — Mineralogical Society of America. Physical-property identification methods, repeat-testing guidance, and limitations.

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Common questions

What is Analcime?: Hydrated sodium aluminum silicate zeolite/feldspathoid forming distinctive trapezohedral crystals. Also spelled analcite.
How can you identify Analcime?: Compare several properties rather than relying on colour alone. This entry records colour: Colorless, white, gray, pinkish; lustre: Vitreous; streak: White; Mohs hardness: 5-5.5; cleavage: Poor; crystal system: Isometric Cubic; transparency: Transparent to translucent. Confirm an important identification with additional field tests or qualified laboratory work.
How does Analcime form?: Forms in basalt cavities from hydrothermal fluids, and as a primary mineral in some alkaline igneous rocks.
Where is Analcime commonly found?: Italy, Iceland, USA, India; found in basalt vesicles and alkaline igneous rocks.
What is Analcime commonly confused with?: Analcime may be confused with Leucite, Garnet, Chabazite. Compare multiple diagnostic properties because colour and surface appearance can overlap.

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Analcime identification and geology

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Sources, scope & corrections

Common questions