Dumortierite

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Physical & Optical Properties

Mohs Hardness 7,0 – 8,5
Specific Gravity 3,26 – 3,41
Refractive Index 1,669 – 1,723
Crystal System Orthorhombic
Luster Vitreous
Cleavage Good
Fracture Conchoidal
Color various
Birefringence 0,011
Pleochroism Strong trichroism for rare red-brown crystals: black - red brown - brown

Mohs Hardness

Mohs Hardness: 7,0 – 8,5
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 Dumortierite

La dumortierita es un mineral de borosilicato de aluminio azul a violeta que se encuentra típicamente en forma masiva y fibrosa en rocas metamórficas de alto grado, valorado como material de cabujón y talla de color azul medio a violeta. Nombrado en honor al paleontólogo francés Eugène Dumortier, el fino material masivo proviene de Nevada, California, Francia y Mozambique. Aunque rara vez es lo suficientemente transparente para facetarla, la dumortierita masiva se pule con un atractivo azul medio que la hace popular en cuentas y tallas decorativas.

Jewelry Use

Durability 7/10

Suitable for daily wear

Science FYI Family

Frequently Asked Questions

What is Dumortierite?
La dumortierita es un mineral de borosilicato de aluminio azul a violeta que se encuentra típicamente en forma masiva y fibrosa en rocas metamórficas de alto grado, valorado como material de cabujón y talla de color azul medio a violeta. Nombrado en honor al paleontólogo francés Eugène Dumortier, el
What is the hardness of Dumortierite?
Dumortierite has a Mohs hardness of 7.0 to 8.5, making it excellent for use in jewelry.
What color is Dumortierite?
Dumortierite is primarily Various.
How much does Dumortierite cost?
Dumortierite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Dumortierite?
Dumortierite belongs to the Orthorhombic crystal system.

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