Pollucite

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Physical & Optical Properties

Mohs Hardness 6,5 – 7,0
Specific Gravity 2,86 – 2,94
Refractive Index 1,517 – 1,525
Crystal System Isometric
Luster Vitreous
Cleavage None
Fracture Conchoidal
Color various
Dispersion 0,014

Mohs Hardness

Mohs Hardness: 6,5 – 7,0
1 Soft10 Hard

Crystal System

Value & Market

Price Tier Moderate ($50-500/ct)

About Pollucite

Pollucite is a rare cesium-bearing zeolite mineral that typically appears colorless to white or pale pink, with a vitreous luster and good transparency in gem-quality specimens. It is one of the primary natural sources of the rare element cesium and is found in lithium-rich granitic pegmatites in Maine, USA, and Manitoba, Canada. Cut stones are prized by collectors for their rarity rather than brilliance, as the gem is relatively soft.

Jewelry Use

Durability 6/10

Science FYI Family

Frequently Asked Questions

What is Pollucite?
Pollucite is a rare cesium-bearing zeolite mineral that typically appears colorless to white or pale pink, with a vitreous luster and good transparency in gem-quality specimens. It is one of the primary natural sources of the rare element cesium and is found in lithium-rich granitic pegmatites in Ma
What is the hardness of Pollucite?
Pollucite has a Mohs hardness of 6.5 to 7.0, making it moderate for use in jewelry.
What color is Pollucite?
Pollucite is primarily Various.
How much does Pollucite cost?
Pollucite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Pollucite?
Pollucite belongs to the Isometric crystal system.

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