Photo: Westernelba · CC BY-SA 4.0

Tourmaline mineral

Properties

Chemical formula

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Group

Oxides

Crystal system

Trigonal

Hardness (Mohs)

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Color

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Luster

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Streak

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Density

—

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

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Transparency

—

Space group

R3m

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

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Birefringence

—

Pleochroism

—

Strunz classification

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Dana classification

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IMA status

Approved mineral and/or valid name (A)

IMA symbol

Cll

Locality

🇮🇹 San Piero in Campo

Type locality

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Discovery year

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Source: Wikidata