Plagioclase

Plagioclase is not amongst the most valuable ore types around, but it contains a large amount of pyerite and is thus always in constant demand. It also yields some tritanium and mexallon. Available in 0.8 to 0.3 security status solar systems.

Plagioclase yields a mix of Tritanium, Pyerite and Mexallon, making it more useful per cycle than Veldspar while still sitting in reachable space. It is a common step up once a miner outgrows the starter belts.