Microcline (large Carlsbad twin) with Schorl

Item Description

Here an impressive specimen for the Feldpsar collectors out there. This is from a find in Pakistan in the late Fall of 2005. This is something that is not often seen from Pakistan. This specimen features a fine quality, sharp, lustrous, porcelain-esque "Carlsbad" twinned crystal of Microcline associated with minor black Schorl crystals. "Carlsbad" twins occur in Feldspars, but they are are quite scarce in such THICK crystals with such excellent form. Carlsbad twins exhibit 2 elongate individuals separated by a single composition plane on 010 and with the vertical {c} axis as the twinning axis. The name of this twin comes from the locality in the Czech Republic, but apparently this is not where the twinning habit was first observed (see the following link for more information: http://www.mindat.org/mesg-7-186620.html. These twins are very hard to obtain from Pakistan, especially is such large, hefty examples.. This piece is a great quality "Carlsbad" twin with excellent form, and looks like a beautiful piece of marble. Valued at $2,500 for the size, morphology and quality.