Idaho Gemstones by County
Gemstone information is available for the following counties. Information comes from Gemstones of Idaho written by Alice Allebaugh. Reference: Idaho Lands website (I'm reposting here because data has a way of disppearring…
Gemstone Guide for Idaho
This information comes Department of Lands website. I'm reposting here because data has a way of disppearring off the internet. (Reference: Information comes from Gemstones of Idaho written by Alice Allebaugh.)…
US Mines listed rhyolite flows
Rhyolitic flows can have high concentrations of fluorine gas dissolved in the lava which allows the rhyolite to become more fluid. Fluorine gas is a key component in the formation…