Yellow Prehnite crystal cluster from the Merelani Hills, Manyara Region, Tanzania.

A rare pseudomorph of Smithsonite after Dolomite from Arkansas. 

Stunning color contrast of green Siderite “Blades” with brassy, iridescent Chalcopyrite crystals in this specimen. Several of the Siderite blades are 1-inch long. The luster of the Siderite is vitreous to pearly while the Chalcopyrite has a brilliant metallic luster.

Rhodochrosite, Chalcopyrite, Quartz 

Champion Mine, Cinnamon Pass, Hinsdale County, Colorado 

Rocky Mountain Gems an Minerals

A beautiful gem crystal of Aquamarine from Vietnam. 

Rhodochrosite with Quartz, Pyrite, Sphalerite combination, Peru

Translucent, Reddish-Pink Rhodochrosite crystals scattered over dozens of terminated Quartz crystals. Rhodochrosite with minor Pyrite and Sphalerite on the bottom. The Rhodochrosite habit is bladed. Vitreous luster.

Location: Pasto Bueno District, Pallasca Province, Ancash Department, Peru

Size: 2.2 x 1.5 x 0.8 inches

A nice combination specimen from Pakistan of Apatite, Muscovite, & Albite.

Tsumeb Mine – Namibia (Excellent Condition

5.5 x 4.5 x 3.5 cm

A nice crystal of Beryl var. Aquamarine with a hollow tip from the Medina Mine in Brazil. 

Petroleum-included Quartz

This piece glitters! Stunning color contrast of green Siderite “Blades” with brassy iridescent Chalcopyrite, whitish Calcite, and gray Tetrahedrite crystals in this specimen. The green blades of Siderite in this piece are very rare! Several of the Siderite blades are at least 0.5 inch long. The Calcite crystals are flattened and translucent. The luster of the Siderite is vitreous while the Chalcopyrite and Tetrahedrite have a brilliant metallic luster.

Double-terminated, Scalenohedral Rhodochrosite from Uchucchacua Mine, Peru

Very pretty and showy gem lustrous red scalenohedral crystals of rhodochrosite are set on matrix. The largest rhodochrosite crystal is double-terminated and measures 17 mm in length. Excellent cherry-red color. Glassy to Vitreous luster.