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Augite

A species of Clinopyroxene Subgroup, Also known as Violatite, Volcanic Shorl, Hedenbergite-Agirin

Scientific name : Augite Mineral Group : Clinopyroxene Subgroup

Augite, A species of Clinopyroxene Subgroup

Also known as:

Violatite, Volcanic Shorl, Hedenbergite-Agirin

Scientific name: Augite

Mineral Group: Clinopyroxene Subgroup

Content

Description People often ask General Info

Description

Augite is known for its luster and gets its name from the Greek word "augites," which means "brightness." It is often found amongst igneous and metamorphic rocks. Augite does not have properties that are commercially useful but is of interest to geologists and collectors.

Physical Properties

Colors

Brown-green, black, green-black, brown, purplish brown

Luster

Vitreous

Diaphaneity

TransparentToOpaque

Refractive Index

1.671-1.774

Pleochroism

Pale green/pale brown/green/greenish yellow, pale brown/pale yellow-green/violet, pale green/grayish green/violet

Optical Character

Biaxial positive

Chemical Properties

Chemical Classification

Silicates

Formula

(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆

Idealised Formula

(Ca, Mg, Fe)₂Si₂O₆

Elements listed

Ca, Fe, Mg, O, Si

Common Impurities

Ti, Cr, Na, Mn, K

People often ask

What is augite used for?

Is augite a Clinopyroxene?

What type of silicate is augite?

Is augite metallic or nonmetallic?

How can you tell the difference between Hornitende and augite?

What does augite mean?

Is augite mafic or felsic?

General Info

How to Select

Augite is most commonly available in purple, brown, and black colors. Specimens typically have a high luster, making dull finishes less valuable. Larger sizes are not uncommon, meaning larger gems usually are not disproportionately priced. Specific gravity and hardness can be tested to determine the authenticity of augite.

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