Police in Mis­souri are try­ing to fig­ure out if $700,000 in gold dust miss­ing from a Pfizer med­ical lab was stolen or sim­ply mis­placed. Police in Chester­field began their inves­ti­ga­tion after the gold dust turned up miss­ing dur­ing an annual inven­tory at the lab. Pfizer had pur­chased the dust in 2011 to be used for research. While small amounts of gold dust may tech­ni­cally be light, it’s unlikely that a light breeze blew away the entire sup­ply. $700,000 in gold dust would weigh between 30 and 70 pounds. Pfizer isn’t say­ing what kind of research it was con­duct­ing with the dust, but gold is com­monly used in a num­ber of indus­tries, includ­ing elec­tron­ics and dentistry.