Phosphorescent Fluorite - El Potosi #10 Shape_Angel and once believed them to

and once believed them to belong to mythological water monsters they called Unktehila

Blue Calcite with Graphite from Spitzkoppe

It's a semi-precious silica mineral that has a frosted outer texture

and is one of the most sought after US varieties of Agate/Chalcedony

Phosphorescent Fluorite - El Potosi #10 Shape_Angel and once believed them toThis very new find Fluorite from December 2025 comes from the El Potosi Mine in Mexico. It has an unusual shape for Fluorite, and the current theory is that these may in fact be pseudomorphs after Calcite. They display not only fluorescence in longwave 365nm light, but also phosphorescence, which depending on the piece, can last several seconds after the UV light is turned off (this is best viewed in complete darkness). You will receive the exact