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...

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

Zunyite is an uncommon aluminum sorosilicate mineral that shows a soft, cherry red fluorescent response under short wave UV. Zunyite...

Located in the Trigo Mountains of La Paz County, Arizona, the Red Cloud mine is a location famous for producing some of the best...

Miller Canyon is located in the rugged terrain of the Huachuca Mountains, in Cochise County, Arizona. Near the top of Miller Canyon lies...