An wonderful specimen of blue prehnite, this like a rosette comprised of crystals all-around (including the backside). These Tanzanian blue prehnite specimens are unique – and this arrangement of crystals is really nice. The crystals are sharp with many lustrous faces, and the colour is very good for the find. In excellent condition, a couple of incomplete areas at the periphery not seen from the front as displayed. A beauty!
The hue of this specimen changes dramatically under different light sources. Under halogen it is a cold, light blue (as in the fourth photo), and under LED and daylight, it has more depth of colour and more warmth.