Phosphophyllite
A variety of Minerals
What is Phosphophyllite?
The clarity and sheen of phosphophyllite make it an excellent selection for use as a gemstone; its brittle nature, however, makes it very difficult to sculpt into any usable form for jewelry. It is mostly used as a collectible gem in its raw state. It is rare to come across the largest specimens, which originate from Bolivia.
Etymology & Origins
Its name derives from its chemical composition (phosphate) and the Greek word for "leaf", phyllon, a reference to its cleavage.
Uses & Applications
It is highly prized by collectors for its rarity and for its delicate bluish green colour. Phosphophyllite is rarely cut because it is fragile and brittle, and large crystals are too valuable to be broken up.
Optical Properties
- Refractive Index
- 1.595-1.621
- Birefringence
- 0.021
- Pleochroism
- None
- Optical Character
- Biaxial negative
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Phosphophyllite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Phosphophyllite Localities Map
See where Phosphophyllite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
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Quick Facts
Physical Properties
- Color
- Bright blue-green to colourless, colourless in transmitted light
- Hardness (Mohs)
- 3 - 3.5
- Density
- 3.12 g/cm³
- Streak
- White
- Luster
- Vitreous, Resinous, Waxy, Sub-vitreous
- Crystal System
- Monoclinic
Chemical Properties
- Chemical Formula
- Zn2Fe(PO4)2 · 4H2O
- Elements
- Fe, H, O, P, Zn
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Phosphophyllite FAQs
How do I identify Phosphophyllite?
Phosphophyllite can be identified by its hardness of 3 - 3.5 on the Mohs scale, Bright blue-green to colourless color, Vitreous, Resinous, Waxy, Sub-vitreous luster, Monoclinic crystal system. Look for these key characteristics when examining specimens.
What color is Phosphophyllite?
Phosphophyllite typically appears in Bright blue-green to colourless, colourless in transmitted light. Color can vary depending on impurities and formation conditions.
How hard is Phosphophyllite?
Phosphophyllite has a hardness of 3 - 3.5 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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