Jeremejevite

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Physical & Optical Properties

Mohs Hardness 6,5 – 7,5
Specific Gravity 3,28 – 3,31
Refractive Index 1,638 – 1,65
Crystal System Hexagonal
Luster Vitreous
Cleavage None
Fracture Conchoidal
Color various
Birefringence 0,007
Pleochroism Dichroism: colorless - body color

Mohs Hardness

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

Crystal System

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

Value & Market

Price Tier Moderate ($50-500/ct)

About Jeremejevite

Jeremejevite is an extremely rare aluminum fluoroborate mineral, typically forming colorless to pale blue or yellow orthorhombic crystals with a vitreous luster and hardness of Mohs 6.5–7.5. First discovered at Mount Soktuj in Siberia, Russia, in 1883 and named for Russian mineralogist Pavel Jeremejew, the finest gem-quality blue material comes from the Erongo Mountains of Namibia. Faceted jeremejevite is considered one of the rarest gemstones in the world, with clean blue stones achieving significant collector prices.

Jewelry Use

Durability 6/10

Science FYI Family

Frequently Asked Questions

What is Jeremejevite?
Jeremejevite is an extremely rare aluminum fluoroborate mineral, typically forming colorless to pale blue or yellow orthorhombic crystals with a vitreous luster and hardness of Mohs 6.5–7.5. First discovered at Mount Soktuj in Siberia, Russia, in 1883 and named for Russian mineralogist Pavel Jeremej
What is the hardness of Jeremejevite?
Jeremejevite has a Mohs hardness of 6.5 to 7.5, making it moderate for use in jewelry.
What color is Jeremejevite?
Jeremejevite is primarily Various.
How much does Jeremejevite cost?
Jeremejevite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Jeremejevite?
Jeremejevite belongs to the Hexagonal crystal system.

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