Talc

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Physical & Optical Properties

Category Collector Gems
Mohs Hardness 1.0
Specific Gravity 2.55 – 2.8
Refractive Index 1.539 – 1.596
Crystal System Monoclinic
Luster soapstone
Cleavage Perfect
Color various
Birefringence 0.046

Mohs Hardness

Mohs Hardness: 1.0
1 Soft10 Hard

Crystal System

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

Value & Market

Price Tier Budget (< $50/ct)

Where to Buy Talc

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About Talc

Talc is the softest mineral on the Mohs scale (hardness 1), a magnesium silicate hydroxide that forms greasy, pearly white to pale green foliated or massive aggregates with an extremely smooth soapy feel. While best known industrially in talcum powder and paper manufacturing, decorative-grade talc (soapstone) has been carved into vessels, figurines, and architectural elements across many cultures. High-quality massive talc from China, Korea, India, and Italy is fashioned into jewelry components, inro, and Chinese carvings.

Jewelry Use

Durability 1/10

Science FYI Family

Frequently Asked Questions

What is Talc?
Talc is the softest mineral on the Mohs scale (hardness 1), a magnesium silicate hydroxide that forms greasy, pearly white to pale green foliated or massive aggregates with an extremely smooth soapy feel. While best known industrially in talcum powder and paper manufacturing, decorative-grade talc (
What is the hardness of Talc?
Talc has a Mohs hardness of 1.0, making it relatively soft for use in jewelry.
What color is Talc?
Talc is primarily Various.
How much does Talc cost?
Talc falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Talc?
Talc belongs to the Monoclinic crystal system.