Copper (large "Spinel"-twin) Prehnite Wulff was one of the

Wulff was one of the founding members of the Colorado Springs Mineralogical Society in 1936

and it displays well from a few angles

This specimen was collected in late 2010 and

luster and overall quality of the crystals

Copper (large "Spinel"-twin) Prehnite Wulff was one of theA 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