crystal habit and structure or read this next

H shared with me an interesting vignette on the German cache for using cash, which is bucking the trend of much of the rest of the world as coin and paper money is exchanged for virtual currency. The article delved into historical and psychological reasons that cash is still king—including bouts of hyperinflation, abrupt transitions to new monetary vehicles, etc., and proved a fascinating primer for the comparative and insightful round-up topical items that Quartz features in really lucid language. You ought to check it out for yourself.