Staurolite

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Physical & Optical Properties

Mohs Hardness 7,0 – 7,5
Specific Gravity 3,7 – 3,8
Refractive Index 1,736 – 1,762
Crystal System Monoclinic
Luster Vitreous
Cleavage Distinct
Fracture Sub-Conchoidal
Color various
Birefringence 0,01

Mohs Hardness

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

Crystal System

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

Value & Market

Price Tier Moderate ($50-500/ct)

About Staurolite

Staurolite is a characteristic metamorphic mineral that forms brown to reddish-brown prismatic crystals, famous for their natural cruciform (cross-shaped) twinning at 60° or 90° angles, which has given rise to legends and religious significance in many cultures. These naturally formed cross-shaped crystals, called fairy crosses, are found in schists and gneisses in Virginia and North Carolina, USA, France, and Scotland, and have been worn as amulets since medieval times. Its distinctive twinning habit makes it one of the most recognizable minerals in nature.

Jewelry Use

Durability 7/10

Suitable for daily wear

Science FYI Family

Frequently Asked Questions

What is Staurolite?
Staurolite is a characteristic metamorphic mineral that forms brown to reddish-brown prismatic crystals, famous for their natural cruciform (cross-shaped) twinning at 60° or 90° angles, which has given rise to legends and religious significance in many cultures. These naturally formed cross-shaped c
What is the hardness of Staurolite?
Staurolite has a Mohs hardness of 7.0 to 7.5, making it excellent for use in jewelry.
What color is Staurolite?
Staurolite is primarily Various.
How much does Staurolite cost?
Staurolite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Staurolite?
Staurolite belongs to the Monoclinic crystal system.

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