Castillo Copper (ASX:CCZ) confirms high-grade copper at Big One, page-4

Have to like the sniff of gold but perhaps even more exciting was the mention of types of copper bearing minerals:

"Observed copper mineralisation occurs as massive veinlets/crackfill veins, while at surface as malachite, azurite, cuprite and chalcocite"

Cuprite and chalocite, the 2 highest grade at 88.8% and 79.8% when pure, and malachite and azurite both over 55%. More please of that!! I understand and agree with the calls to get on with the drilling, there have been a lot of announcements that are kind of fluffy, but on the positive, they do highlight that the team appears to be taking a very thorough approach to delineating targets.

https://en.wikipedia.org/wiki/List_of_copper_ores