Siderite, Quartz, & Pyrite on Sphalerite, Panasqueira Mines, Portugal. grace The red color in the

The red color in the orbs is caused by hematite staining of the feldspar

San Jose Mine

This is a beautiful small example of fire engine red vanadinite from the well know Geronimo mine in Arizona

7 grams and measures 6 x 5

This piece is completely natural

Siderite, Quartz, & Pyrite on Sphalerite, Panasqueira Mines, Portugal. grace The red color in theSiderite, Quartz, Marcasite, & Pyrite on Sphalerite. Panasqueira Mines, Portugal. 8. 2 x 4. 6 x 2. 3 cm A classic example from the mines of Panasqueira in Portugal. A large discus shaped crystal of siderite measuring over 25mm in length sits atop a matrix of highly reflective sphalerite. Associated with this specimen as well are tiny crystals of glittery pyrite partnered with smaller siderite crystals, coxcomb style marcasite, and a few transparent