"Fassaite is a variety of augite with a very low iron content, Ca(Mg,Fe,Al)(Si,Al)2O6. It is named after the Fassa Valley, Italy.
It is thought to be ...
[Tovább olvasom]
a contact mineral formed at high temperature on the interface between volcanic rocks and limestone. It is also reported in meteorites." - (Wikipedia (en) 09.03.2020)
