Mariusz Oleszczuk Posts - TopicsExpress

I have very much enjoyed the conversation concerning descloisite
I have very much enjoyed the conversation concerning descloisite from Tsumeb - especially as it involves people who have actually worked in the mine. ...

This is a very large piece. It features a base of calcite and
This is a very large piece. It features a base of calcite and reddish brown dolomite in alternating layers. Atop of this are two generations of calcit...