Phosphophyllite

Phosphophyllite is one of the rarest gemstones. Nevertheless, it is highly prized by collectors. A phosphophyllite crystal is prismatic or with a thick, tabular habit. It ranges from colorless to deep bluish-green. However, the best stone is a very delicate bluish-green. Nevertheless, phosphophyllite is rarely cut, as the stone is fragile and brittle. Similarly, a large phosphophyllite is too valuable to be broken up.

Occurrence

Gem-quality phosphophyllite crystals occur in Bolivia. Other localities include New Hampshire (USA) and Germany.

Phosphophyllite Properties

• Specific Gravity: 3.10
• Refractive Index: 1.59-1.62
• Birefringence (DR): 0.021
• Luster: Vitreous
• Crystal Structure: Monoclinic
• Composition: Hydrated zinc phosphate
• Hardness: 3½

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Crystals Directory

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Birthstone

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