Sapphirine

Formula: (Mg,Al)₈(Al,Si)₆O₂₀
Mineral class: silicates
Crystal system: monoclinic or triclinic
Mohs scale: 7.5
Density (g/cm³): 3.42 - 3.48
Refractive index: 1.714 - 1.723
Cleavage: fair - poor
Colors: grey, blue, green
Luster: vitreous
Fluorescence: -
Pleochroism:
X: colorless, yellow, red, green, Y: blue - blue-green, Z: light blue - dark blue
Largest Sapphirine: 3 cm?
Deposits: Antarctica, Australia, Germany, Greece, Greenland, Italy, Madagascar, South Africa, Tanzania, USA
Discovery: 1819
1st Description: 1944
Name: ref. to its sapphire-like color

Sapphirine

Size: 0.74 x 0.45 cm
Weight: 0.84 ct
Origin: Sri Lanka

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Sapphirine Mineral

Origin: Androy / Madagascar

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Sapphirine

Weight: 0.21 ct

Origin: Tunduru / Tanzania

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Sapphirine

Weight: 0.33 ct

Origin: Sri Lanka

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Sapphirine

Weight: 0.40 ct

Origin: Sri Lanka

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Sapphirine

Size: 0.61 x 0.39 cm
Weight: 0.51 ct
Origin: Sri Lanka

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Sapphirine

Size: 0.92 x 0.72 x 0.55 cm
Weight: 2.88 ct
Origin: Kolonne / Sri Lanka

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Sapphirine

Size: 0.71 x 0.57 x 0.36 cm
Weight: 1.01 ct
Origin: Kolonne / Sri Lanka

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Sapphirine

Weight: 0.39 ct

Origin: Sri Lanka

Photo by kind permission of © www.multicolour.com