has been replaced with silica, calcite, pyrite, or another inorganic material,
in this case the red being vanadanium and the yellow low grade uranium. Yikes!
These gorgeous examples have been collected over the years by my wife and myself.
We say we're not scared...We're petrified!
And here's the proof.
"I'm not going to upvote you 🐋 Do it yourself! #8 Contest
jaybird
Wow, cool! Thanks, and a tip o' me hat to you, bro.