Nice cabinet-sized specimen of calcite (red fluorescence), willemite (green fluorescence) and fluorite (blue fluorescence), from the Hull...

This lovely 2-color fluorescent specimen contains willemite and sphalerite, and is from the Nelly James Mine (also known as Miller...

This beautiful 4-color rock is from the Nelly James Mine (also known as Miller Canyon), in southern Arizona. At its best under short...

Vivid pink and blue fluorescence is seen in this specimen of smithsonite from the Glove Mine in Santa Cruz County, Arizona. When viewed...

Vivid pink and blue fluorescence is seen in this specimen of smithsonite from the Glove Mine in Santa Cruz County, Arizona. When viewed...

This banded fluorescent beauty is from the Pure Potential Mine in La Paz County, Arizona, and features alternating bands of red...

Tiny (1mm) colorless to brown zunyite crystals in quartz matrix, fluorescing deep red in SW. Yellow-fluorescing microcrystals of what is...

This material is variously called chalcedony, agate, or pastellite jasper. It comes from an area south of Burro Creek. Pale blue in white...

Named after its type locality, the Zuni mine in San Juan County, Colorado, zunyite is an uncommon aluminum sorosilicate mineral that...

A piece of calcite from Purple Passion displaying SW violet and orange fluorescence. Lit by a 15w Glw Stck. Specimen is 78 x 42 x 38mm.