Rough Purple Sapphire, Color Change Flame Fusion Crystals Rough Piece:Semicircle Tail, 19.8×15.3×10.1mm, 7.74g Neodymium makes YAG a versatile

Neodymium makes YAG a versatile laser crystal

9ct and measures 16

The ruby is flame fusion material grown for jewelry

a standard ER-11 collet for holding dops

see purchasing links below)

Rough Purple Sapphire, Color Change Flame Fusion Crystals Rough Piece:Semicircle Tail, 19.8×15.3×10.1mm, 7.74g Neodymium makes YAG a versatileThese are pieces of labmade purple color change sapphire grown by the now defunct Swiss Djeva corporation. These have some nice color changes depending on lighting, and when cut will show flashes of multiple colors under mixed lighting. Some have more or less of a color change, the photos show them under different lighting conditions in order to try to capture the colors. Color change sapphire is an all time classic. The color change aspect comes from