Glass luster, purple and blue, cubic, Fluorite crystals with bladed, fluorescent (red) Calcite and minor Muscovite associations from Yaogangxian Mine in China.
 
The top of the cluster has a unique paralellepipe form crystal protruding, framed by the muscovite. The purple phantoms are near the surface of the gem clear Fluorite, obscuring the blue color until it is lit well.
 
Measurements: 6.9 x 5.5 x 3.7