Fluorescent Rocks // Shortwave, A Whole New Way of Seeing the Rock World!
13:42
Fluorescent Rocks | Understanding UV Light and Minerals
17:04
Hardness Testing Rocks // Using the Moh's Hardness Test Kit
45:29
Touring the AZ Rockhound Expeditions Lapidary Shop
19:17
Rock and Mineral Identification
1:02
Minerals Fluorescing Under Different UV Wavelengths
17:43
Yooperlite Hunting 101
9:03
Invisible light will make 'Gold of the North' visible?
26:34