Darrell Henry
@tourmaline728.bsky.social
Geologist, petrologist, geochemist
Tourmaline is the most common borosilicate mineral in the Earth's crust. It is stable as low as 100 C and as high as 900 C and up to pressures of 6 GPa. In addition to boron, it contains a very wide range of ions that control the stability and variety of colors that it exhibits (see slices below).
November 25, 2024 at 10:48 PM
Tourmaline is the most common borosilicate mineral in the Earth's crust. It is stable as low as 100 C and as high as 900 C and up to pressures of 6 GPa. In addition to boron, it contains a very wide range of ions that control the stability and variety of colors that it exhibits (see slices below).
Series of tourmalines with different colors and morphologies.
November 21, 2024 at 4:20 PM
Series of tourmalines with different colors and morphologies.