A question often asked: “Is the blue fluorescence in this rock real?”. This is a pretty common question, or often a wrong conclusion made by many first starting out in our hobby. Our UV lights have UV bandpass filters (“filter” defined here for our purposes as UV transmitting, visible blocking) which block the visible light…

There is something I call the "feldspar effect". When people first start collecting fluorescent minerals in the field they usually are amazed at the typical fluorescence of your average feldspar. As they gain experience and see more fluorescent minerals they realize...