"Mines" is sufficient methinks

so would be "Minerals" "Mining" "Resources" "Metals" etc

Development has 2 warts: (1) It sounds like a generic term - could be a software development co.; (2) For those in the know re: mining development companies, those are currently out of favor vs producers due to credit unavailability.

FRG was Fronteer Development until ~ 6 months ago when they changed their name to Fronteer Gold. Tyhee has chosen to stay as Tyhee Development over the same time period. Pull up this pictorial representation re: who made a better choice:

http://finance.yahoo.com/echarts?s=FRG+Interactive#chart1:symbol=frg;range=6m;compare=tdc.v;indicator=volume;charttype=line;crosshair=on;ohlcvalues=0;logscale=on;source=undefined