GEMSTONE LIBRARY
SPESSARTITE GARNET
The spessartite garnet is a variety of orange garnet coloured by manganese. It is mined in Tanzania, Nigeria, Namibia, Kenya and Italy. Its very attractive colour makes it a much sought-after gem.
Each gemstone brought to the laboratory is analysed and identified so that the related report can be drawn up.
CHARACTERISTICS
- Name: Spessartite
- Mineralogical nature: Garnet
- Colour: Yellow to orange to brown
- Crystal system: Cubic
- Chemical composition: Mn32+Al2(SiO4)3
- Causes of colour: Mn2+
- Physical properties:
- Density: 4.12 to 4.18
- Hardness: 7.5
- Cleavage: None
- Fracture: Conchoidal
- Optic sign: Isotropic
- Refractive index: 1.780 to 1.810
- Birefringence: Null
- Dispersion: 0.027
- Pleochroism: Null
- UVL: Inert
- UVC: Inert
- Treatments: None
- Syntheses: None
- Geographical origin: Tanzania, Nigeria, Namibia, Kenya, Italy, Brazil, China, etc.
CONTACT US :
contact@lfg.paris
(+33) 01 40 26 25 45
30, rue de la Victoire - 75009 Paris
Monday - Thusday : 9H30 to 17H00
Friday : 9h30 to 16h30
Withdrawal files at same days and time
