

Linde Star Sapphire
In 1947, the Linde Air Products Company of New York began producing a form of synthetic gem corundum that was marketed in the gemstone...


Calcite on Fluorite from Moscona Mine, Spain.
Moscona Mine, located in El Pontón de Solís region, town of Corvera de Asturias, in Spain. The fluorite in this location appears in the...


Pollucite, a Rare Fluorescent Cesium-Containing Zeolite Mineral
Here’s one for the connoisseur of rare fluorescent mineral species. Pollucite, a cesium-containing zeolite, isn’t particularly rare in...


Barite, Skunk Pocket, Linwood Mine, Buffalo, Iowa
This large and aesthetic barite specimen was collected from the Linwood Mine, Buffalo, Scott Co., Iowa from a find made in November 2019...