Orthoclase
description: <p style="text-align: justify;">LOCALITY:  Tanzania  </p> <p style="text-align: justify;"> </p> <p style="text-align: justify;">1 1/4" across</p> <p style="text-align: justify;"> </p> <p style="text-align: justify;">Unlike most orthoclase crystals from this locality, none of the faces on this crystal are etched. The surface that the specimen sits on is a break where the crystal probably became detached from the pocket wall that it originally grew on. Transparent orthoclase is a great rarity -- at least thousands of times rarer than opaque orthoclase. Hence, since this feldspar crystal is transparent, almost complete and in such good condition, it is surely a mineralogical oddity. Of course, the main factor that contributes to its "oddness" is the transparency.</p> <p style="text-align: justify;"> </p> <p style="text-align: justify;">This fine crystal was previously in the collection of John Saull.  I bought it from Cal Graeber in early 2001.  I traded it out to Professor Stephen Smale during a visit to Hong Kong in late 2013.  </p> <p style="text-align: justify;"> </p> <p style="text-align: justify;">Photo by Matthew Webb of Melbourne, Victoria, Australia </p>
0 selected items clear
selected items : 0
Buy
Clear