Siderite, Quartz, & Pyrite on Sphalerite, Panasqueira Mines, Portugal. crystal skull California

California

North Carolina

5cm and weighs approximately 45 grams

Cave-In-Rock District

Tigers eye in sterling silver setting

Siderite, Quartz, & Pyrite on Sphalerite, Panasqueira Mines, Portugal. crystal skull CaliforniaSiderite, 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