Probably Soapstone. Tough to photograph; cabochon is slightly lighter than it appears. Gloria at Wire Treasures is going to transform this cab into a pendant.

34.5mm x 26.5mm x 8mm; cab has a flat girdle.   Weight: 55.95 carats.

Every one of my cabochons is custom cut to take the best advantage of the particular slab from which it is fashioned. Colors may vary somewhat from what is pictured due to differences in computer monitors.

Click the image on the right to see the cabochon super-sized...

SOA006