Pyromorphite

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Physical & Optical Properties

Mohs Hardness 3,5 – 4,0
Specific Gravity 6,5 – 7,1
Refractive Index 2,042 – 2,059
Crystal System Hexagonal
Cleavage Imperfect
Fracture Sub-Conchoidal
Color various
Birefringence 0,01
Pleochroism Weak

Mohs Hardness

1 Talc 2 Gypsum 3 Calcite 4 Fluorite 5 Apatite 6 Orthoclase 7 Quartz 8 Topaz 9 Corundum 10 Diamond Pyromorphite
Mohs hardness of Pyromorphite shown against the ten reference minerals, from talc (1) to diamond (10).
Mohs Reference mineral Pyromorphite
1 Talc
2 Gypsum
3 Calcite
4 Fluorite
5 Apatite
6 Orthoclase
7 Quartz
8 Topaz
9 Corundum
10 Diamond

Crystal System

a a c Hexagonal a = b ≠ c, α = β = 90°, γ = 120°

Value & Market

Price Tier Budget (< $50/ct)

About Pyromorphite

Pyromorphite is a vivid lead phosphate chloride mineral displaying bright shades of green, yellow, orange, and brown in barrel-shaped hexagonal crystals with a resinous to adamantine luster. It forms as a secondary mineral in the oxidized zones of lead ore deposits and produces some of the most visually spectacular mineral specimens in the world, particularly from China, Germany, and Idaho, USA. Its intense colors and well-formed crystals make it a perennial favorite among collectors.

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Frequently Asked Questions

What is Pyromorphite?
Pyromorphite is a vivid lead phosphate chloride mineral displaying bright shades of green, yellow, orange, and brown in barrel-shaped hexagonal crystals with a resinous to adamantine luster. It forms as a secondary mineral in the oxidized zones of lead ore deposits and produces some of the most visu
What is the hardness of Pyromorphite?
Pyromorphite has a Mohs hardness of 3.5 to 4.0, making it relatively soft for use in jewelry.
What color is Pyromorphite?
Pyromorphite is primarily Various.
How much does Pyromorphite cost?
Pyromorphite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Pyromorphite?
Pyromorphite belongs to the Hexagonal crystal system.

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