Goethite

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Physical & Optical Properties

Mohs Hardness 5,0 – 5,5
Specific Gravity 4,27 – 4,29
Refractive Index 2,26 – 2,398
Crystal System Orthorhombic
Luster Adamantine,Silky,Dull (Earthy),Metallic
Cleavage Perfect
Fracture Uneven,Splintery
Color various
Birefringence 0,138
Pleochroism Visible

Mohs Hardness

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

Crystal System

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

Value & Market

Price Tier Budget (< $50/ct)

About Goethite

La goethita es un mineral de óxido hidratado de hierro que forma cristales prismáticos aciculares de color marrón a amarillo negruzco, o masas botroides con lustre sedoso. Como mineral de alteración ubicuo, es responsable del color amarillo-marrón de muchas rocas intemperizadas, pero las inclusiones de goethita dentro del cuarzo o el ópalo crean gemas ornamentales únicas que presentan iridiscentes destellos cobrizos dorados. El ágata de goethita y el cuarzo con inclusiones de goethita son materiales de lapidaria apreciados.

Jewelry Use

Durability 4/10

Science FYI Family

Frequently Asked Questions

What is Goethite?
La goethita es un mineral de óxido hidratado de hierro que forma cristales prismáticos aciculares de color marrón a amarillo negruzco, o masas botroides con lustre sedoso. Como mineral de alteración ubicuo, es responsable del color amarillo-marrón de muchas rocas intemperizadas, pero las inclusiones
What is the hardness of Goethite?
Goethite has a Mohs hardness of 5.0 to 5.5, making it moderate for use in jewelry.
What color is Goethite?
Goethite is primarily Various.
How much does Goethite cost?
Goethite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Goethite?
Goethite belongs to the Orthorhombic crystal system.

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