A large sharp cubic metallic pyrite crystal in tan-colored Basalt matrix. The pyrite crystal has smooth crystal faces with almost mirror-like luste...

Two large cubic pyrite crystal across intergrown perched on Basalt matrix. The pyrite crystals have smooth faces and sharp edges, stands upright ni...

Several large cubic pyrite crystal across intergrown perched on Basalt matrix. The pyrite crystals have smooth faces and sharp edges, stands uprigh...

Two large cubic pyrite crystal across intergrown perched on Basalt matrix. The pyrite crystals have smooth faces and sharp edges, stands upright ni...

Classic old-European specimen with a lustrous combination of well defined pyritohedral crystal cluster of Italian pyrite on hematite matrix. This u...

Red Quartz Hematite crystal cluster from Izizauen Alnif, Tarhbalt, Morocco. Cylindrical stalactite of calcite crystals mixed with red hematite.  He...

Red Quartz Hematite crystal cluster from Izizauen Alnif, Tarhbalt, Morocco. Cylindrical stalactite of calcite crystals mixed with red hematite.  He...

Red Quartz Hematite crystal cluster from Izizauen Alnif, Tarhbalt, Morocco. Cylindrical stalactite of calcite crystals mixed with red hematite.  He...

Red Quartz Hematite crystal cluster from Izizauen Alnif, Tarhbalt, Morocco. Cylindrical stalactite of calcite crystals mixed with red hematite.  He...

From Guilin Prefecture, Guangxi Zhuang Autonomous Region, China Aesthetic stalactitic formation of translucent tanish-orange scalenohedral calcite ...

Lustrous transparent deep golden calcite crystal on small sphalerite matrix. Large double terminated scalenohedral twinned on the C-axis with well ...

Lustrous transparent deep golden calcite crystal. Large double terminated scalenohedral twinned on the C-axis with well defined re-entrant faces, w...