Rock-finding UV flashlights, also known as ultraviolet or black light flashlights, are specialized tools used by rockhounds, mineral collectors, and geologists to identify and examine fluorescent minerals, gemstones, and fossils. These flashlights emit ultraviolet light, which is invisible to the human eye but can cause certain minerals to emit visible light, or fluorescence, in a variety of vibrant colors.
How They Work:
UV flashlights work by emitting ultraviolet light in wavelengths typically ranging from 365 to 395 nanometers (nm). When this UV light interacts with fluorescent minerals, it excites their electrons, causing them to release energy in the form of visible light. This phenomenon, known as fluorescence, can be helpful in identifying certain minerals and revealing unique features that might not be visible under normal lighting conditions.