Gahnite (member of spinel subgroup)
Gahnite is a mineral that is composed of zinc aluminate (ZnAl2O4). It was first discovered in 1807 by Swedish mineralogist Johan Gadolin.
Chemical Formula
The chemical formula for gahnite is ZnAl2O4.
Discovery
Gahnite was first discovered in 1807 by Swedish mineralogist Johan Gadolin. It was named after Swedish chemist and mineralogist Johan Gadolin.
Physical Properties
- Color: green, brown, black
- Crystal System: cubic
- Hardness: 7.5
- Specific Gravity: 4.4
Optical Properties
- Refractive Index: 1.78
- Birefringence: none
- Pleochroism: none
- Dispersion: none
Occurrence by Country
Gahnite is found in a variety of countries around the world, including:
- Australia
- Brazil
- China
- India
- Italy
- Russia
- Sweden
- United States
Healing Properties
Gahnite is believed to have healing properties that can help with:
- Emotional balance
- Stress relief
- Pain relief
Uses
Gahnite is used in a variety of applications, including:
- Ceramics
- Electronics
- Glassmaking
- Jewelry
- Refining zinc
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