Nellite Pietersite Rough Rock Slab Stone for Cabbing
Lovely flashy unpolished stone slab of Nellite from China.
This smaller unpolished semiprecious stone slab weighs .10 lbs. and is shown wet in the first 3 pictures.
This lapidary rough rock stone slab is just 3 inches by 2.3 inches and 5 mm thick.
Nellite is a trade name for a semiprecious stone that is a combination of Pietersite and Tigereye.
Tigereye or Tiger's Eye is a quartz usually with rich yellow and brown stripes, but can be red or blue. It contains oriented fibers of crocidolite that have been replaced by silica.
With its strong chatoyance, the gemstone gets its name from its resemblance to the eye of a tiger.
Pietersite is a trade name for a dark yellow-blue-grey breccia aggregate made up mainly of hawk's eye and tiger-eye. It is a variety of chalcedony (itself a variety of quartz) with embedded fibers of amphibole minerals in varying degrees of alteration. The fibers cause a chatoyancy like that seen in tiger-eye.
Pietersite was named in honor of Sid Pieters who discovered it in 1962 in Namibia, Africa.