Boji stone (Pop Rock)
Hardness: 5-6 Color: black, brown, gray Formula: FeS2 + FeooH.n H2o Crystal System: cubic The boji stones are natural iron ore ’balls’ spherical or lens shaped pyrites with limonite. According to the recent researches they consist palladium too. Their locality is the pyramidal Smoky Hill in Gove Country, Kansas State, USA. Similar pyrite balls issue...