Heubnerite
Heubnerite is a dark reddish-brown submetallic to resinous mineral that forms monoclinic long prismatic striated crystals. It may occur granular massive or bladed and simple contact twinning is common. Heubnerite is a heavy mineral that is somewhat soft and slightly transparent. The deep red color is best seen at points where the crystals have been broken or chipped and viewed in a bright light source or natural sunlight. This mineral may be found on matrix with Casserite, Quartz, Fluorite, Tourmaline, or Topaz to name a few. Heubnerite was named for Adolph Heubner, a metallurgist of Freiburg, Saxony. The best specimens of this mineral tend to come from Colorado or Peru.
Item# 1HEUB10080051
Heubnerite with Quartz from Peru
A very deep red, almost black color. Under direct lighting, hints of red may be seen on this rare specimen of Heubnerite from Peru. A very nice Quartz Crystal Cluster sets atop one end of this piece. Specimens like this are very difficult to find. (Photo emphasis is on the Heubnerite, not the Quartz cluster, taken to show the colors of the Heubnerite crystals.)
This specimen weighs 1oz (29 g) and measures 1.5 x 1.1 x 1.1 in (3.8 x 2.8 x 2.8 cm).