Grossular Garnet
Grossular
A variety of Garnet Group
What is Grossular Garnet?
Grossular Garnet was named after the Greek word "grossularia" which means "gooseberry" and it refers to the green color this mineral is often found in, although it can be orange, black, brown, cream, or even colorless. Reddish-brown and pink specimens are most commonly used for faceted gems, known by the name "cinnamon stone."
Optical Properties
- Refractive Index
- 1.730-1.760
- Optical Character
- Isotropic
- Dispersion
- 0.02
Discover Values
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Grossular Garnet before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Grossular Garnet Localities Map
See where Grossular Garnet is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Brown, orange, red, yellow, green, white, colorless
- Hardness (Mohs)
- 6.5 - 7
- Density
- 3.594 g/cm³
- Streak
- White to pale Brownish white
- Luster
- Vitreous, Sub-vitreous
- Crystal System
- Isometric
Chemical Properties
- Chemical Formula
- Ca3Al2(SiO4)3
- Elements
- Al, Ca, O, Si
Also Known As
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Grossular Garnet FAQs
How do I identify Grossular Garnet?
Grossular Garnet can be identified by its hardness of 6.5 - 7 on the Mohs scale, Brown color, Vitreous, Sub-vitreous luster, Isometric crystal system. Look for these key characteristics when examining specimens.
What color is Grossular Garnet?
Grossular Garnet typically appears in Brown, orange, red, yellow, green, white, colorless. Color can vary depending on impurities and formation conditions.
How hard is Grossular Garnet?
Grossular Garnet has a hardness of 6.5 - 7 on the Mohs scale. This gives it moderate hardness.