13.15ct Bi-color Raw Tanzanite Crystal malachite This vibrant yellow color came

This vibrant yellow color came after the heat treatment and you can see what it originally looked like before heating in the photo below

Measurement: 45mm x 30mm x 20mm

Measurement:  23mm x 19mm x 10mm

This piece would be considered an Extra Large Cabinet Specimen (XLC)

Weight: 111

13.15ct Bi-color Raw Tanzanite Crystal malachite This vibrant yellow color cameThis beautiful crystal goes from a deep blue violet towards the base of the crystal to a gemmy, almost transparent termination. A beautiful specimen. We do believe that this crystals color has been enhanced by heating. Weight: 13. 15ct Measurements: 21mm x 8mm x 6mm