A very rare Zircon cabochon from Karavita, Sri Lanka with a faint cat's-eye effect.

The green gem is a metamict Zircon, slightly altered by natural radiation, and holds a series of fine needle-like inclusions which run through the length of the stone resulting in the faint chatoyant band which can be seen travelling across the domed surface of the cabochon.

Images 4 and 5 are slightly magnified views of the inclusions and the silvery sheen of the cat's-eye phenomenon.

This cabochon comes with a gem identification report from the Gemological Institute of Ratnapura (Sri Lanka).

weight:  2.21 carats
shape:  Cushion shape cabochon
dimensions:   8.28 x 6.45 x 3.63 mm
treatment:  None