51.86ct Amazing Natural Color Tanzanite Crystal museum but this piece would be

but this piece would be ideal for cutting/carving a thin opal

23ct    Color: Heated

they are fairly gemmy in certain areas and will show a color change of green (fluorescent light) to red (incandescent light) when the crystal is back lit

10ct    Color: Natural Unheated

51.86ct Amazing Natural Color Tanzanite Crystal museum but this piece would beThis Tanzanite Crystal Specimen comes from Tanzania. It has completely natural crystal faces and termination. It has an amazing color for a natural and unheated tanzanite crystal. This piece would be a stunning addition to any mineral or Tanzanite collection. Get a better look at this piece by viewing it in the 360 degree video! Locality: Merelani Hills, Tanzania Measurement: 43mm x 10. 5mm x 10mm Weight: 51. 86ct Color: Unheated