Apophyllite

Formulas:
Hydroxyapophyllite (OH-Ap.): KCa₄Si₈O₂₀(OH,F)·8H₂O
Fluorapophyllite (F-Ap.): (K,Na)Ca₄Si₈O₂₀(F,OH)·8H₂O ("Collectors Apophyllite")
Natroapophyllite (Na-Ap.): NaCa₄Si₈O₂₀F·8H₂O (very rare)
Mineral class: silicates
Crystal system: OH-Ap. and F-Ap.: tetragonal, Na-Ap.: orthorhombic
Mohs scale: OH-Ap. and F-Ap.: 4.5 - 5; Na-Ap.: 4 - 5
Density (g/cm³): OH-Ap.: 2.37; F-Ap.: 2.33 - 2.37; Na-Ap.: 2.3
Refractive index: 1.535 - 1.537
Cleavage: OH-Ap.: perfect, Na-Ap. and F-Ap.: different
Colors:
F-Ap.: colorless, white, yellow, orange, pink, green
OH-Ap.: colorless, white
Na-Ap.: colorless, white, brownish
Transparency: transparent - translucent
Luster: vitreous - pearly
Fluorescence: F-Ap.: yellowish, greenish
Pleochroism: -
Largest crystal: OH-Ap.: 15 cm, F-Ap.: 20 cm, Na-Ap.: 0.1 cm
Deposits: worldwide
Na-Ap.: Australia, China, Japan, Namibia, UK, USA
Discovery and 1st Description: Na-Ap.: 1981, OH-Ap. and F-Ap.: 1978
Name: from the Greek word "apophylliso" (to flake off)

Apophyllite Mineral

Origin: Poona / India

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Apophyllite

Weight: 3.86 ct

Origin: Poona / India

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Apophyllite Mineral (F-Ap.)

Size: 6.7 x 4.0 x 4.0 cm

Origin: San Martin Mine / San Martin / Sombrerete / Zacatecas / Mexico

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Apophyllite Mineral (F-Ap.)

Size: 6.4 x 5.9 x 4.2 cm

Origin: Jalgaon Distr. / Maharashtra / India

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Apophyllite Mineral (F-Ap.)

Size: 7 x 7 x 5 cm

Origin: Nasik / Maharashtra / India

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Apophyllite Mineral (F-Ap.)

Size: 6.3 x 5.4 x 3.9 cm

Origin: Jalgaon Distr. / Maharashtra / India

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Apophyllite Mineral (F-Ap.)

Size: 6.4 x 6.3 x 3.8 cm

Origin: Rahuri / Ahmadnagar / Maharashtra / India

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Apophyllite Mineral (F-Ap.)

Origin: Poona / India

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Apophyllite Mineral (F-Ap.)

Size: 3.6 x 3.1 x 1.3 cm

Origin: Jalgaon Distr. / Maharashtra / India

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Apophyllite

Size: 0.75 cm
Weight: 1.97 ct
Origin: India

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Apophyllite Mineral (F-Ap.)

Size: 5.6 x 4.9 x 3.2 cm

Origin: Jalgaon Distr. / Maharashtra / India

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Apophyllite Mineral (F-Ap.) on Stilbite

Size: 6.0 x 5.0 cm

Origin: Jalgaon Distr. / Maharashtra / India

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