Grossular

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Physical & Optical Properties

Mohs Hardness 7,0 – 7,5
Specific Gravity 3,55 – 3,73
Refractive Index 1,73 – 1,76
Crystal System Isometric
Luster Vitreous
Cleavage None
Fracture Conchoidal
Color various
Dispersion 0,02

Mohs Hardness

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

Crystal System

Value & Market

Price Tier Moderate ($50-500/ct)

About Grossular

Grossular is a calcium aluminum garnet occurring in a wide range of colors—colorless, yellow, orange, brown, pink, and the highly prized vivid green tsavorite and hessonite orange-brown varieties. It forms in metamorphic calc-silicate rocks and in contact metasomatic environments, with important sources in Tanzania, Kenya, Sri Lanka, and Canada. The green tsavorite variety, discovered in Tanzania and Kenya near Tsavo National Park in the 1960s, has become one of the most valuable garnets.

Jewelry Use

Durability 7/10

Suitable for daily wear

Science FYI Family

Frequently Asked Questions

What is Grossular?
Grossular is a calcium aluminum garnet occurring in a wide range of colors—colorless, yellow, orange, brown, pink, and the highly prized vivid green tsavorite and hessonite orange-brown varieties. It forms in metamorphic calc-silicate rocks and in contact metasomatic environments, with important sou
What is the hardness of Grossular?
Grossular has a Mohs hardness of 7.0 to 7.5, making it excellent for use in jewelry.
What color is Grossular?
Grossular is primarily Various.
How much does Grossular cost?
Grossular falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Grossular?
Grossular belongs to the Isometric crystal system.

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