Welcome to PureGreek! We love olives. We’re a little obsessed, actually. But we’re also picky about our olives. Any olive won’t do, it has to be real – it has to be organic. Why is that? conventional production uses Caustic Soda to mature green olives instead of the original, traditional salty mixture. Caustic Soda kills all nutrients and vitamins natural and essential to olives. Black olives mature on trees, and needs to be picked at a very specific moment. To get around that by coloring olives