We have for sale a supberb example of plumbian feldspar (lead feldspar) from Broken Hill, NSW. Among the amazing variety of Broken Hill minerals, this one is a real stand out, saturated green, translucent feldspar of this color is rare! These green feldspars are rather uncommon, I actually do not know of any other source of green microline feldspar in the world. This specimen is very special as it has a large terminated face (termination of any form are rare) the pics show the reflections of the terminated faces, clearly. The name plumbian feldspar, comes from the high lead content in the mineral. This feldspar was mined more than 40 years ago and nothing since (mainly due to the mechanization of the mining process). Interestingly this plumbian feldspar, is colorless to white when mined, but when exposed to light turns this very pleasant shade of almost emerald green. The change is permant and does not fade even after many years! Good translucency, pics show front and rear. Today this green plumbian feldspar is rarely seen for sale, please check the web for availability. Ex Russel Kanowski collection, with label ( strangely this specimen was tagged as hedenbergite by Russel) Another uncommon thing about this piece is that it has good fluorescence. Top specimen!!
BROKEN HILL, NSW.
40 x 35 x 18mm