Zincite

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Physical & Optical Properties

Mohs Hardness 4,0
Specific Gravity 5,5 – 5,9
Refractive Index 2,013 – 2,029
Crystal System Hexagonal
Luster Subadamantine
Cleavage Perfect
Fracture Sub-Conchoidal
Color various
Birefringence 0,016
Pleochroism Very weak, in two tones of body colour

Mohs Hardness

Mohs Hardness: 4,0
1 Soft10 Hard

Crystal System

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

Value & Market

Price Tier Budget (< $50/ct)

About Zincite

Zincite is a zinc manganese oxide mineral occurring naturally in deep orange-red to yellow hexagonal crystals with a subadamantine to resinous luster, found almost exclusively at the world-famous Franklin and Sterling Hill zinc mines in New Jersey, USA, alongside the spectacular fluorescent minerals willemite and calcite. Transparent deep red crystals from Franklin are extraordinarily rare and highly prized collector gems, while a surprising secondary source of large, well-formed synthetic zincite crystals emerged from the chimneys of the Silesian zinc smelter in Poland.

Jewelry Use

Durability 3/10

Science FYI Family

Frequently Asked Questions

What is Zincite?
Zincite is a zinc manganese oxide mineral occurring naturally in deep orange-red to yellow hexagonal crystals with a subadamantine to resinous luster, found almost exclusively at the world-famous Franklin and Sterling Hill zinc mines in New Jersey, USA, alongside the spectacular fluorescent minerals
What is the hardness of Zincite?
Zincite has a Mohs hardness of 4.0, making it relatively soft for use in jewelry.
What color is Zincite?
Zincite is primarily Various.
How much does Zincite cost?
Zincite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Zincite?
Zincite belongs to the Hexagonal crystal system.

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