I can only assume that there aren't many AGR shares available to actually trade. AGR's sp increased in leaps and bounds with many gaps. The shares seem to be tightly held and mgt apparently have a good track record.
TRH has been traded for a number of years with possibly more 'tradable' shares in more hands. Nothing wrong with TRH mgt either but haven't probably the 'repute' if you will as AGR's mgt.
Sylvinite certainly is a high grade ore, but carnallite is a hydrated form of potash ( KMg3Cl6H20 ) with those 6 di-hydrogen oxides easier to dissolve.
I hold AGR and TRH
TRH Price at posting:
62.0¢ Sentiment: LT Buy Disclosure: Held