Pietersite Rectangle Cabochon mine pietersite is known as tempest

pietersite is known as tempest stone

seams or a crack in the host rock

which is what causes the chatoyancy in gemstones of this family

measurement: 30mm × 18mm

" It is the official state fossil of Wyoming

Pietersite Rectangle Cabochon mine pietersite is known as tempestWeight: 5. 9g (29. 5ct) Approx. measurement: 30mm 18mm 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