Fayalite

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Physical & Optical Properties

Mohs Hardness 6,5 – 7,0
Specific Gravity 4,392
Refractive Index 1,827 – 1,879
Crystal System Orthorhombic
Luster Vitreous,Resinous
Cleavage Imperfect
Fracture Conchoidal
Color various
Pleochroism Faint: pale yellow - yellow-orange, reddish brown.

Mohs Hardness

Mohs Hardness: 6,5 – 7,0
1 Soft10 Hard

Crystal System

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

Value & Market

Price Tier Moderate ($50-500/ct)

About Fayalite

La fayalita es el miembro terminal rico en hierro del grupo del olivino, formando cristales isométricos de color amarillo verdoso a marrón negruzco en ciertas rocas ígneas y pegmatitas. Aunque es el componente más inestable del olivino (se altera con más rapidez que el forsterita), los cristales claros de fayalita son raras gemas de coleccionista apreciadas por su rareza mineralógica más que por cualquier aplicación gemológica comercial.

Jewelry Use

Durability 6/10

Science FYI Family

Frequently Asked Questions

What is Fayalite?
La fayalita es el miembro terminal rico en hierro del grupo del olivino, formando cristales isométricos de color amarillo verdoso a marrón negruzco en ciertas rocas ígneas y pegmatitas. Aunque es el componente más inestable del olivino (se altera con más rapidez que el forsterita), los cristales cla
What is the hardness of Fayalite?
Fayalite has a Mohs hardness of 6.5 to 7.0, making it moderate for use in jewelry.
What color is Fayalite?
Fayalite is primarily Various.
How much does Fayalite cost?
Fayalite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Fayalite?
Fayalite belongs to the Orthorhombic crystal system.

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