Smithsonite

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Physical & Optical Properties

Mohs Hardness 5,0 – 5,5
Specific Gravity 4,0 – 4,65
Refractive Index 1,62 – 1,85
Crystal System Trigonal
Luster Vitreous,Pearly
Cleavage Perfect
Fracture Uneven
Color various
Birefringence 0,228
Dispersion 0,014
Pleochroism Absent

Mohs Hardness

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

Crystal System

a a a Trigonal (Rhombohedral) a = b = c, α = β = γ ≠ 90°

Value & Market

Price Tier Budget (< $50/ct)

About Smithsonite

Smithsonite is a zinc carbonate mineral that occurs in a remarkable range of pastel colors including mint green, sky blue, pale lavender, pink, yellow, and white, typically forming botryoidal, stalactitic, or rhombohedral masses with a vitreous to resinous luster. Named after mineralogist James Smithson (founder of the Smithsonian Institution), it is found in the oxidized zones of zinc ore deposits in Namibia, Greece, Mexico, and Sardinia. Its soft pastel hues and waxy surface make it a popular cabochon and carving material.

Jewelry Use

Durability 4/10

Science FYI Family

Frequently Asked Questions

What is Smithsonite?
Smithsonite is a zinc carbonate mineral that occurs in a remarkable range of pastel colors including mint green, sky blue, pale lavender, pink, yellow, and white, typically forming botryoidal, stalactitic, or rhombohedral masses with a vitreous to resinous luster. Named after mineralogist James Smit
What is the hardness of Smithsonite?
Smithsonite has a Mohs hardness of 5.0 to 5.5, making it moderate for use in jewelry.
What color is Smithsonite?
Smithsonite is primarily Various.
How much does Smithsonite cost?
Smithsonite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Smithsonite?
Smithsonite belongs to the Trigonal crystal system.

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