The Ruby Violet mine, owned by Gemstone Mining, produces 5,000 to 7,000 carats a year. "Gemstone mining map" was originally created and published by Mining Technology, a GlobalData owned brand.

The Hunt for Fenn’s Treasure has sparked a new treasure hunt, with viewers making a map for Justin Posey’s alleged loot.

ME-GRA21: High-precision gold and silver determination using fire assay with gravimetric finish.