Crystallization of Barite Crystal and Fluorcalcioromeite…

Botroidal goethite with metallic from Tharsis mines…

Yellow and miel cubic fluorite on matrix from Moscona mine…

Very bright wulfenite crystals, caramel yellow, highly transparent, tabular and tetragonal morphology…

Botryoidal chrysocolla crystal aggregate of turquoise tones.

Aggregate of aragonite crystals.

Combination of dodecahedral pyrite crystals.

Fluorapatite crystals that react to ultraviolet light, calcite crystals, hematite crystals and other minerals…

Spheroidal crystals of Libethenite and Malachite with a green color.

Isolated dolomite crystals of the Teruelite variety on a gypsum matrix…

Chromite and Garnierite crystallizations on matrix.

A Pseudomorphic crystal of Limonite pyrite.

Large, translucent SCHEELITE crystal with a contact twin. The largest face is 1.4 inches long. Brilliant golden-yellow color. It fluoresces blue under short wave UV light. The matrix is silvery MUSCOVITE. The specimen is from the famous Pingwu mine in China. Scheelite is a major ore for Tungsten. This specimen is from the collection of Roger Maynard. Roger is a friend and was a long-time geologist with the US Geological Survey.

Vitreous black TOURMALINE from the Harney Peak Pegmatite of South Dakota.