Tibetan Black Spot Quartz: crystal - Bridge

I bought a number of Tibetan Black Spot crystals back in 2003 when they first came onto the market. They have been in my personal and teaching collection since then, but it is now time for them to find new Keepers! This one has a very good clarity, with lots of black spots and clouds, and rainbow-filled cavities. Fracturing and bridging with other crystals during growth means that there are no terminations discernible to the eye, although the ends of the crystal are fascinating to examine: there are multiple bridge and penetration crystals, and several keys.
Size: 10 x 2 x 1.75 cm