One of the Dev's plans for rebalancing the mineral market was to increase the amount of low end minerals refined from mid range ores, the types of ore found in low sec and garden variety 0.0 systems*.
A quick examination of the test server shows the current changes as
Jaspet now refines to 439 Pyerite, was previously only 259
Hemorphite triples the amount of Tritanium from 212 up to 650, and gains 260 Pyerite and 60 Mexallon
Hedbergite added 290 Pyerite to the refinery output.
Spodumain more than quadruples its tritanium output up to 3190 from 700, and almost triples its pyerite content to 400 from 140.
So, if you're mining any of these ores I'd sit on them until the new release to maximise your profits.
* Many miners who've never left empire labour under the delusion that Arkonor is found throughout 0.0, anyone who's been there will attest otherwise, most 0.0 systems are in fact crap for mining.