also called Bastnäsite is a cerium fluoride carbonate with formula (Ce, La)CO3F and hardness of 4.5. It’s a complex mineral, for detailed information go to http://en.wikipedia.org/wiki/Bastn%C3%A4site
Most of the stones in the market now are coming from Pakistan.The color is from yellow to brown-orange-red and often has a good color change shift when seen from fluorescent to incandescent light, like this stone here. Small inclusions, over all good brillancy.
Size: 6.2x4.8x2.8 mm.
Weigth: 0.92 ct.