Stone: Blue spinel Weight: 2.50 cts. Clarity: VVS Dimensions: 8.21x 8.15x 5.23mm Design: Fantasy trillion star Origin: Ceylon, Sri Lanka Treatment: None Cut by: John B. Notes: Blue spinel with one unusual aspect when under certain spectrum of fluorescent light it turns purple. It is a wonderful stone to add to any collection. The stone is fine blue and the tone of the stone is medium to medium dark.