Copper (large "Spinel"-twin) Prehnite I have photographed the crystals

I have photographed the crystals under the microscope to show that they are truly terminated crystals and not just a mass

single finger-shaped cast of Prehnite after Anhydrite with bright green color

Phetteplace collection

luster and overall quality of the crystals

Copper (large "Spinel"-twin) Prehnite I have photographed the crystalsA truly impressive and superb quality, large "Spinel" twinned crystals of Native Copper from the recent mining at this large Copper pit locality in Australia. The specimen almost reminds me of an arrow due to its shape, but it also has somewhat of an organic quality to it as well. The piece displays a fantastic blending of the large central twin which is flanged on several sides by small Copper crystallization, along with the gorgeous skeletal or