Sens or base d Ore sortin g Tech nology 26 Curr entl y bei ng tested by Cron i me t to r ecover ti n concen tra tes Advances i n sensor techn ol ogy now al l ow for dete cti on of ph ysi cal pr oper ti es of m i ner al s such as speci fi c gr avi ty Mi ner al s can be concen tra ted after crushi ng w i t h o u t u s i n g w a t e r o r c h e m i c a l r e a g e n ts