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

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

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

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About Proustite

La proustita, denominada «rubí plateado ligero» o «rubí de plata rojo», es un sulfoarseniuro de plata de color rojo escarlata a rojo carmín profundo con lustre adamantino y semitransparente en fragmentos delgados. Se forma en venas hidrotermales de plata junto con la pirargirita y otros minerales de plata, siendo los yacimientos de Chañarcillo en Chile y los de Alemania sus fuentes históricas más célebres. Es sensible a la luz y tiende a oscurecerse con el tiempo, por lo que las muestras bien conservadas de cristales brillantes son muy preciadas.

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Frequently Asked Questions

What is Proustite?
La proustita, denominada «rubí plateado ligero» o «rubí de plata rojo», es un sulfoarseniuro de plata de color rojo escarlata a rojo carmín profundo con lustre adamantino y semitransparente en fragmentos delgados. Se forma en venas hidrotermales de plata junto con la pirargirita y otros minerales de
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.