Caledonite

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Physical & Optical Properties

Category Collector Gems
Mohs Hardness 2,5 – 3,0
Specific Gravity 5,6 – 5,76
Refractive Index 1,818 – 1,909
Crystal System Orthorhombic
Cleavage Perfect,Imperfect
Fracture Uneven
Color various
Pleochroism Weak

Mohs Hardness

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

Crystal System

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

Value & Market

Price Tier Budget (< $50/ct)

Where to Buy Caledonite

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About Caledonite

La calcedonita es un mineral sulfatocarbonato de plomo y cobre, extremadamente raro, que cristaliza en el sistema ortorrómbico formando cristales prismáticos o aciculares de un intenso color azul verdoso a verde azulado, con brillo vítreo. Se forma en la zona de oxidación de depósitos de plomo y cobre. Su rareza y sus cristales de colores vivos la convierten en una pieza muy cotizada por los coleccionistas mineralógicos avanzados. Los yacimientos más importantes se encuentran en el Reino Unido (Leadhills, Escocia, de donde toma su nombre —Caledonia es el nombre romano de Escocia—), Estados Unidos, Chile y Australia.

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Frequently Asked Questions

What is Caledonite?
La calcedonita es un mineral sulfatocarbonato de plomo y cobre, extremadamente raro, que cristaliza en el sistema ortorrómbico formando cristales prismáticos o aciculares de un intenso color azul verdoso a verde azulado, con brillo vítreo. Se forma en la zona de oxidación de depósitos de plomo y cob
What is the hardness of Caledonite?
Caledonite has a Mohs hardness of 2.5 to 3.0, making it relatively soft for use in jewelry.
What color is Caledonite?
Caledonite is primarily Various.
How much does Caledonite cost?
Caledonite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Caledonite?
Caledonite belongs to the Orthorhombic crystal system.