The holohedral galenas of Madan, Bulgaria

Since the Denver Stock Exchange in 2009, so-called “holohedral” galenas have been circulating at numerous trade fairs as well as on the internet. Holohedral, this means that of the classic cubic morphology of a galena crystal, only the edges remain...

These shapes were studied closely by Justin Zzyzx with the help of James Madison University in the USA. The images obtained below with a scanning electron microscope (SEM) very clearly show micro-abrasion of these objects. The small-scale surface is completely cratered and even sometimes abrasive particles (round and white sphere) are still present! These crystals are therefore in no way natural, they are just the result of not very honest "craft"... using a micro-sandblaster...

Source: Fakeminerals, Justin Zzyzx