Almandine
Precious Gemstone
What is Almandine?
Almandine is a species of garnet, a nesosilicate mineral. It is the most common of the gem garnets and is known for its rich red color, often with hints of orange or violet. It is a relatively hard and durable gemstone, making it suitable for various types of jewelry.
Optical Properties
- Refractive Index
- 1.830-1.880
- Birefringence
- None
- Pleochroism
- Weak to absent
- Optical Character
- Isotropic
- Dispersion
- 0.022
Almandine Market Value Calculator
Estimate the market value of Almandine using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.
Almandine Localities Map
See where Almandine is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Map preview
North ZoneCentral RidgeSouth Basin
More Images
© Charles J. Sharp
Quick Facts
Physical Properties
- Color
- Red, reddish-orange, reddish-brown, violet-red
- Hardness (Mohs)
- 7 - 7.5
- Density
- 4.15 - 4.30 g/cm³
- Streak
- White to colorless
Chemical Properties
- Chemical Formula
- (Fe2+3Al2(SiO4)3)
- Elements
- Iron, Aluminum, Silicon, and Oxygen
Also Known As
AlmanditeAlmandine GarnetCarbuncle
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