Rough Purple Sapphire, Color Change Flame Fusion Crystals Rough Piece:Semicircle Tail, 19.8×15.3×10.1mm, 7.74g 1 carats and measures 24x10

1 carats and measures 24x10

or maybe just square rods)

Neodymium makes YAG a versatile laser crystal

up to a quarter mm

It weighs in at 53 carats and measures 20mm point to point

Rough Purple Sapphire, Color Change Flame Fusion Crystals Rough Piece:Semicircle Tail, 19.8×15.3×10.1mm, 7.74g 1 carats and measures 24x10These 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