Wednesday, April 3, 2013

Gemstone of the Week: Herderite

(Image of Herderite found on edelsteine.at)

Herderite was discovered in 1828,  It was named by Wilhelm Haidinger in honor of Siegmund August Wolfgang von Herder who was the mining official in Freiberg, Germany.  It has a hardness of 5-5.5.  It's colour is typically colourless, pale yellow, or greenish-white.  It is a transparent to translucent gemstone with a vitreous or sub-vitreous luster.  Herderite is a rather rare gemstone and most of what is on the market is actually Hydroxylherderite (which from what I've seen tends to have stronger colour).  This makes it very difficult to know where actual Herderite is found, but some of the places that have been confirmed to have Herderite (but also have Hydroxylherderite so still be careful) are: two locations in Brazil, the Mogok township in Burma(Myanmar), the Yichun Prefecture in China, and in Namibia.