Compare Minerals

Put any two minerals side by side — formula, structure, hardness, density and more. Type to search each slot.

Mineral A

Mineral B

Tokkoite

Name

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K₂Ca₄Si₇O₁₈(OH)F

Formula

—

Mineral Species

Entry type

—

Silicates

Chemical class

—

Triclinic

Crystal system

—

4–5

Mohs hardness

—

2.761

Specific gravity

—

Streak

—

Vitreous

Luster

—

Perfect on {010}, less perfect on {110}

Cleavage

—

P-1

Space group

—

Structural group

—

Tok · Approved

IMA

—

1985

Named in

—

Light brown to pale yellow; colorless in transmitted light

Typical colors

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K · Ca · Si · O · H · F

Elements

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