Sulphur

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Physical & Optical Properties

Category Collector Gems
Mohs Hardness 1.5 – 2.5
Specific Gravity 2.05 – 2.08
Refractive Index 1.958 – 2.245
Crystal System Orthorhombic
Luster Adamantine
Color various
Birefringence 0.291

Mohs Hardness

Mohs Hardness: 1.5 – 2.5
1 Soft10 Hard

Crystal System

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

Value & Market

Price Tier Budget (< $50/ct)

Where to Buy Sulphur

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About Sulphur

Sulphur (sulfur) is a native element mineral forming bright canary-yellow to golden orthorhombic crystals with a resinous to adamantine luster around volcanic fumaroles and in evaporite deposits, producing one of nature's most visually striking yellow mineral specimens. Sicily, Italy, and volcanic zones around the Pacific Rim yield exceptional crystal specimens, and sulphur has been utilized since antiquity for medicines, fumigants, and gunpowder. Despite its softness and brittleness, sulphur crystals are a staple of mineral collections worldwide.

Jewelry Use

Durability 1/10

Science FYI Family

Frequently Asked Questions

What is Sulphur?
Sulphur (sulfur) is a native element mineral forming bright canary-yellow to golden orthorhombic crystals with a resinous to adamantine luster around volcanic fumaroles and in evaporite deposits, producing one of nature's most visually striking yellow mineral specimens. Sicily, Italy, and volcanic z
What is the hardness of Sulphur?
Sulphur has a Mohs hardness of 1.5 to 2.5, making it relatively soft for use in jewelry.
What color is Sulphur?
Sulphur is primarily Various.
How much does Sulphur cost?
Sulphur falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Sulphur?
Sulphur belongs to the Orthorhombic crystal system.