Pyrophyllite

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Physical & Optical Properties

Category Collector Gems
Mohs Hardness 1,0 – 2,0
Specific Gravity 2,65 – 2,9
Refractive Index 1,534 – 1,601
Crystal System Monoclinic
Luster Pearly,Greasy
Cleavage Perfect
Fracture Splintery
Color various
Birefringence 0,05
Pleochroism Nil

Mohs Hardness

Mohs Hardness: 1,0 – 2,0
1 Soft10 Hard

Crystal System

β a b c Monoclinic a ≠ b ≠ c, α = γ = 90°, β ≠ 90°

Value & Market

Price Tier Budget (< $50/ct)

Where to Buy Pyrophyllite

Amazon Wide selection

Links may earn a commission at no extra cost to you.

About Pyrophyllite

Pyrophyllite is a soft aluminum silicate mineral with a pearly to silky luster that ranges in color from white and pale yellow to green and gray, often forming foliated or radiating aggregates. Prized in ancient China for carving the decorative Shoushan stones used in seals and figurines, it has been a medium for Chinese artists for centuries. Today fine-grained green or cream-colored material continues to be fashioned into small carvings and collectibles.

Jewelry Use

Durability 1/10

Science FYI Family

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Frequently Asked Questions

What is Pyrophyllite?
Pyrophyllite is a soft aluminum silicate mineral with a pearly to silky luster that ranges in color from white and pale yellow to green and gray, often forming foliated or radiating aggregates. Prized in ancient China for carving the decorative Shoushan stones used in seals and figurines, it has bee
What is the hardness of Pyrophyllite?
Pyrophyllite has a Mohs hardness of 1.0 to 2.0, making it relatively soft for use in jewelry.
What color is Pyrophyllite?
Pyrophyllite is primarily Various.
How much does Pyrophyllite cost?
Pyrophyllite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Pyrophyllite?
Pyrophyllite belongs to the Monoclinic crystal system.