Siderite on Galena Orthoclase but finding true bicolor twins

but finding true bicolor twins is off the charts

Peridot is rare enough from Myanmar

The quality is good for the species

one of the most momentous Prehnite discoveries was made at the Prospect Park Quarry

A very attractive larger Spinel crystal from this historic locality in southeast Asia

Siderite on Galena Orthoclase but finding true bicolor twinsFrom the collection of well known Colorado mineral collector, George Robertson. My dad traded this piece from George in the early 1980s. The piece features dozens of rosettes of tan Siderite which are sitting atop rather lustrous, well formed, cuboctahedra of Galena on Sphalerite and Pyrite matrix. The Julia Fisk Mine is one of the more notable specimen producing mines in the Leadville District, especially since it was one of the few Leadville mines