underthescopemin: Covellite, Luzonite Here is a fine example of the paragenesis of covellite: the rhombic cavity was a feldspar phenocryst that dissolved away during a sulfate alteration event. The sulfate was subsequently replaced by quartz, mostly
tags: So many OTPs, queue,
from: https://eikuuhyo.tumblr.com/post/102089291933