38.31ct Calcite Covered Tanzanite Crystal Topaz These octahedrons did not naturally

These octahedrons did not naturally form like this

The silvery matrix has a slight sheen which makes it look almost glittery as you can see in the photos

Measurements: 85mm x 48mm x 25mm

it is more than likely that these two fossils were mounted and fixed aesthetically on the center sandstone

Measurement: 91

38.31ct Calcite Covered Tanzanite Crystal Topaz These octahedrons did not naturallyThis beautiful Tanzanite Crystal has half of its crystal faces covered in a pretty white calcite. Its a gemmy mineral specimen with natural color and has a cool addition of a secondary calcite growth over the top. A very interesting piece. Watch the video to see a high resolution 360 view of this crystal. Locality: Merelani Hills, Tanzania Measurement: 33. 1mm x 12. 4mm x 10. 7mm Weight: 38. 31ct Color: Natural Unheated Tanzanite Crystal w White