Proustite

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Physical & Optical Properties

Category Collector Gems
Mohs Hardness 2.5
Specific Gravity 5.51 – 5.64
Refractive Index 2.792 – 3.087
Crystal System Trigonal
Luster Adamantine
Cleavage Distinct
Fracture Uneven,Conchoidal
Color various
Birefringence 0.295
Pleochroism Strong

Mohs Hardness

Mohs Hardness: 2.5
1 Soft10 Hard

Crystal System

a a a Trigonal (Rhombohedral) a = b = c, α = β = γ ≠ 90°

Value & Market

Price Tier Budget (< $50/ct)

Where to Buy Proustite

Amazon Wide selection

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About Proustite

Proustite, known as Ruby Silver, is a vivid ruby-red to scarlet silver sulfosalt mineral with an adamantine luster that glitters brilliantly in light. It forms in the oxidation zones of silver ore deposits and is found in Saxony, Germany, Chile, and Mexico, where it has historically been an important silver ore. Though its softness and sensitivity to light make it challenging to facet, fine crystals are among the most spectacular red mineral specimens.

Jewelry Use

Durability 1/10

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Frequently Asked Questions

What is Proustite?
Proustite, known as Ruby Silver, is a vivid ruby-red to scarlet silver sulfosalt mineral with an adamantine luster that glitters brilliantly in light. It forms in the oxidation zones of silver ore deposits and is found in Saxony, Germany, Chile, and Mexico, where it has historically been an importan
What is the hardness of Proustite?
Proustite has a Mohs hardness of 2.5, making it relatively soft for use in jewelry.
What color is Proustite?
Proustite is primarily Various.
How much does Proustite cost?
Proustite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Proustite?
Proustite belongs to the Trigonal crystal system.