Nice little specimen from the Chashan Mine, Xianghualing Sn-polymetallic ore field, Linwu Co., Chenzhou, Hunan, China. Interestingly, the...

Large, brightly fluorescent, pseudo-octahedral scheelite crystal on a matrix of non-fluorescent muscovite plates. From Mt Xuebaoding,...

Delicate casts of light blue triangular plumbogummite crystals growing over/after decayed hexagonal green pyromorphite crystals, a few of...

Purple octahedral fluorite crystals in matrix with a second generation of colorless cubic fluorite atop. The octahedral crystals...

A seldom seen fluorescent mineral - Kuangshan Town, Lengshuijiang City, Loudi City, Hunan Prov. - under longwave. Photo courtesy 沈洪涛

Had a great time at Tucson and found lots of new material. This was one of my favorite finds - Calcite crystals on fluorite crystals -...

Gibbsite is a relatively rare aluminum hydroxide. It is composed of two different color phases: a rich blue and a lighter sky blue with...

Fluorite and calcite combinations from China are pretty common. This one however, just seems different. Perhaps it's that the calcite...

White hexagonal columnar calcite with black scalenohedron color zoning. It is a two generation growth calcite where the inner black...

High power LED 365nm lights are changing the fluorescent mineral hobby. Folks can now collect fluorescent minerals with a light costing...