How can you identify Diopside?

Compare several properties rather than relying on colour alone. This entry records colour: Light to dark green, white; lustre: Vitreous; streak: White to light green; Mohs hardness: 5.5-6.5; cleavage: Good in two directions at 87°; crystal system: Monoclinic; transparency: Transparent to translucent. Confirm an important identification with additional field tests or qualified laboratory work.

What is Diopside commonly confused with?

Diopside may be confused with Augite, Actinolite, Epidote. Compare multiple diagnostic properties because colour and surface appearance can overlap.

GeoMiner Free earth-science tools

Built by a geologist

Diopside identification and geology

Calcium-magnesium pyroxene forming light green prismatic crystals. Chrome diopside is a vivid green gemstone variety. Color: Light to dark green, white. Luster: Vitreous. Streak: White to light green. Cleavage: Good in two directions at 87°. Hardness: 5.5-6.5. Transparency: Transparent to translucent. Crystal system: Monoclinic. Chemical formula: CaMgSi₂O₆. Specific gravity: 3.22-3.38. Formation: Forms in metamorphosed siliceous limestones and in mafic igneous rocks. Common geological settings: Russia chrome diopside , Austria, Italy, USA; found in marbles and skarns. Common look-alikes and related entries: Augite, Actinolite, Epidote.

Browse all mineral identification entries — Compare this entry with the complete GeoMiner minerals collection.
Previous: Diamond — Native carbon crystallized under extreme pressure in the Earth mantle. Hardest natural material 10 on Mohs scale .
Next: Dioptase — Hydrated copper silicate with intense emerald-green color. Too soft and brittle for jewelry but prized by collectors.
Augite
Actinolite
Epidote

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: 2026-03-30T14:36:46.73272+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.

Read GeoMiner's editorial methodology or report a content issue.

Common questions

What is Diopside?: Calcium-magnesium pyroxene forming light green prismatic crystals. Chrome diopside is a vivid green gemstone variety.
How can you identify Diopside?: Compare several properties rather than relying on colour alone. This entry records colour: Light to dark green, white; lustre: Vitreous; streak: White to light green; Mohs hardness: 5.5-6.5; cleavage: Good in two directions at 87°; crystal system: Monoclinic; transparency: Transparent to translucent. Confirm an important identification with additional field tests or qualified laboratory work.
How does Diopside form?: Forms in metamorphosed siliceous limestones and in mafic igneous rocks.
Where is Diopside commonly found?: Russia chrome diopside , Austria, Italy, USA; found in marbles and skarns.
What is Diopside commonly confused with?: Diopside may be confused with Augite, Actinolite, Epidote. Compare multiple diagnostic properties because colour and surface appearance can overlap.

JavaScript is loading the interactive GeoMiner experience. The identification tools provide educational candidates, not laboratory confirmation.

Diopside identification and geology

Browse this collection and related resources

Sources, scope & corrections

Common questions