Dims: 2.2" x 1.4" x 0.6" (5.6 x 3.6 x 1.5 cm)
Wt: 23.6 g
Thormale, Nala, Pakistan
This specimen of Sphene is different from most of the others in our selection for two reasons. First, it is one of the few pieces we have that consists of three crystals which are embedded into a piece of host rock, which seems to be made of layers of massive quartz, feldspar, and a gneiss of some sort. Secondly, the crystals are not covered with tiny crystals of either more Sphene or chlorite, as most in our selection are. The largest crystal measures 0.5 x 0.3 x 0.2" (1.3 x 0.8 x 0.5 cm), the smallest measures 2 mm at most in each dimension, and the third crystal is about halfway between the two. All are in excellent condition, with sharp edges and very clean faces. Near the center of one dimension on both the largest and the smallest crystal, there is a naturally occurring notch that is an obvious sign of twinning. They have an olive-green color that is a bit richer than most peridots that I have seen, and their luster is adamantine. All are somehwhat transparent, though their clarity is interrupted by many inclusions and internal fractures; the smaller crystals tend to be clearer, though. They rest amidst a cluster of small, white calcite crystals that partially coat the host rock.