Omphacite

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Physical & Optical Properties

Mohs Hardness 5.0 – 6.0
Specific Gravity 3.16 – 3.43
Refractive Index 1.662 – 1.723
Crystal System Monoclinic
Luster Vitreous,Silky
Cleavage Good
Fracture Uneven,Conchoidal
Color various
Pleochroism Weak: colorless -- very pale green -- very pale green, blue-green.

Mohs Hardness

Mohs Hardness: 5.0 – 6.0
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)

About Omphacite

Omphacite is a sodium calcium magnesium iron aluminum silicate clinopyroxene, the primary mineral in the metamorphic rock eclogite, typically forming compact granular green masses of varying intensity alongside garnet in deep crustal and subducted oceanic crust environments. It occurs in high-pressure metamorphic terranes worldwide, including Norway's Western Gneiss Region, the Swiss Alps, and China's Dabie-Sulu belt. The ornamental rock "omphacitite" or jade-like omphacite-rich eclogite has been fashioned into carvings and cabochons.

Jewelry Use

Durability 4/10

Science FYI Family

Frequently Asked Questions

What is Omphacite?
Omphacite is a sodium calcium magnesium iron aluminum silicate clinopyroxene, the primary mineral in the metamorphic rock eclogite, typically forming compact granular green masses of varying intensity alongside garnet in deep crustal and subducted oceanic crust environments. It occurs in high-pressu
What is the hardness of Omphacite?
Omphacite has a Mohs hardness of 5.0 to 6.0, making it moderate for use in jewelry.
What color is Omphacite?
Omphacite is primarily Various.
How much does Omphacite cost?
Omphacite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Omphacite?
Omphacite belongs to the Monoclinic crystal system.

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