Ceylon Blue Star Sapphire 4.22 carats 12.5x8.3x3.6mm
This is an especially 'electric' colored piece with its peacock blue color. Mined and cabbed in Ceylon, the stone is translucent with a nice 6 pointer on its face as well. Very very thin star in depth, so it really gives the outward appearance of a much larger stone.
FYI-That star sapphire is that variety of sapphire in which when the stone is cut (cabbed) and rounded off horizontal with the dome of the crystal, the light is condensed across the three lines of the crystalline interference. These crossed lines produce a star which moves as a source of light, or as it is moved from the source of light.