Passara Gem Mine, near Ratnapura, Sri Lanka
Thumbnail, 1.3 x 1.1 x 0.9 cm
A bizarre yellow sapphire with a weloganite-shaped body, illustrating either twinning of some kind or just a weird "pinch" about the middle of a single crystal. The ends are terminated with a simple hexagon, and the piece is thus a floater. It is very sharp, showing none of the rounding normally associated with many Sri Lankan crystals found in the alluvial gem gravels. Weight is approximately 14 carats. This crystal was sold as gem rough, by weight, at one of the gem shows: I had to buy it based on its weight as gem rough that could be treated and cobbed!