A classic specimen of the famous, but difficult to find, twinned orthoclase crystals from this locality of Bohemia. A floating specimen with the Carlsbad twin. Well defined. There has been some debate as to whether or not Loket is the type locality for the Karlsbad twin habit of feldspar, as "Karlsbad" / "Carlsbad" is the old name for Karlovy Vary. More information on this can be found in  [mindat].

Very curious group of interpenetrated leucite crystals pseudomorphosed by feldspar. A classic from Czech Republic appreciated by pseudomorph collectors. Good size.