11.57ct BiColor Pink & Violet/Blue Tanzanite Crystal Colorado but this particular piece has

but this particular piece has an intense green glow in daylight

so they can potentially double as facet rough

This lovely cabinet sized calcite specimen has a beautiful coloration with the most saturation towards the tips of the calcite crystals

It is green on the outsid and has the purple within

it would be valued at $12

11.57ct BiColor Pink & Violet/Blue Tanzanite Crystal Colorado but this particular piece hasThis beautiful Tanzanite Crystal has a unique divide of pink and blue violet with a good crystal structure and natural termination. A great gemmy mineral specimen. Watch the video to see a high resolution 360 view of this crystal. Locality: Merelani Hills, Tanzania Measurement: 14. 2mm x 9. 6mm x 8. 6mm Weight: 11. 57ct Color: Natural Unheated