Schorl

Physical & Optical Properties

Mohs Hardness 7.0
Specific Gravity 3.18 – 3.22
Refractive Index 1.635 – 1.672
Crystal System Hexagonal
Luster Vitreous,Resinous
Cleavage Poor
Fracture Uneven,Conchoidal
Color various
Birefringence 0.025
Pleochroism Very strong: yellow-brown - pale yellow, pale brown.

Mohs Hardness

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

Crystal System

a a c Hexagonal a = b ≠ c, α = β = 90°, γ = 120°

Value & Market

Price Tier Moderate ($50-500/ct)

About Schorl

Schorl is the most common member of the tourmaline group, a black iron-rich variety that forms lustrous opaque prismatic crystals with distinctive vertical striations in granitic pegmatites and schists worldwide. While its opaque nature limits its use as a faceted gemstone, schorl has been used since antiquity in carved beads and mourning jewelry, and is widely employed in crystal healing practices. Large, well-formed schorl crystals from Brazil and Pakistan are popular display specimens.

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Jewelry Use

Durability 7/10

Suitable for daily wear

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Frequently Asked Questions

What is Schorl?
Schorl is the most common member of the tourmaline group, a black iron-rich variety that forms lustrous opaque prismatic crystals with distinctive vertical striations in granitic pegmatites and schists worldwide. While its opaque nature limits its use as a faceted gemstone, schorl has been used sinc
What is the hardness of Schorl?
Schorl has a Mohs hardness of 7.0, making it excellent for use in jewelry.
What color is Schorl?
Schorl is primarily Various.
How much does Schorl cost?
Schorl falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Schorl?
Schorl belongs to the Hexagonal crystal system.

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