Pietersite Free Form Cabochon Amber These pyrite cubes may appear

These pyrite cubes may appear to be man-made at first

and sardines

and even frozen carcasses found in Siberian permafrost

Pietersite started as the mineral crocidolite--one of several minerals such as tigereye--which belong to the riebeckite family of amphibole silicates

Pietersite Free Form Cabochon Amber These pyrite cubes may appearWeight: 3. 3g (16. 5ct) Approx. dimensions: 28mm 19mm Pietersite, also called "eagle's eye," was named in honor of Sid Pieters who discovered it in 1962 in Namibia, Africa. Pietersite is a trade name for a dark blue grey breccia aggregate made up mainly of hawk's eye and tigereye. 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 blue chatoyancy