In Excel dates are numbers formatted to look like the dates we recognise. Today (12 June 2012) is 41072 or that many days since 1 jan 1900. we can ceck if the cell is formatted as a date but that doesn't mean it contains one or we can check if it's a number. =isnumber(p1)
About US Mineral Exchange. The US Mineral Exchange is an online platform designed specifically for mineral owners. Our education center helps mineral owners understand the industry, what factors affect the value of their minerals, and how the process of selling or leasing their minerals works.
A Guide to the Tucson Mineral Shows for First-Time Visitors. by John H. Betts, All Rights Reserved. Each year, in late January to early February, mineral dealers, prospectors, buyers, collectors converge on Tucson, Arizona for the annual series of gem and mineral shows.he first thing to know is there are three types of mineral dealers that coexist side-by-side at all of the shows: Retail dealers: selling regular show stock of retail minerals. They are set up in Tucson just as any other show.