Medium Conichalcite Crystal Matrix 4.5x4x1 from Mexico

Specimen composed of a matrix of fluorite with greenish tones, ilmenite and a group of bright acicular and crystals of creedite.

Two cubic crystals of the rare mineral BOLEITE. Boleite contains silver, copper, lead and other elements. The larger crystal has a face of 0.4 inches with noticeable wear on the lower half. The smaller cube has no damage. From the type locality of the Boleo District of Baja California Sur, Mexico. The luster is vitreous.

Cluster of bipyramidal CALCITE crystals with a maroon color, most likely from inclusions of iron. The largest crystal is 1.5 inches in length. The specimen is museum size, 6.1 inches in length. This specimen is from the collection of Roger Maynard. Roger is a friend and was a long-time geologist with the US Geological Survey.

This specimen is entirely translucent Hyalite Opal except for a little bit of dirt on the bottom that I could not clean off. The Hyalite fluoresces a brilliant green under a short-wave UV light. 

The Hyalite Opal is the clear, globular layer on top of the white Milk Opal in this specimen. The Hyalite fluoresces a brilliant green under a short-wave UV light.