I dont actually know what type they are. Hubby brought them home for me one day. We don't even like olives! Lol. Olive oil is the only thing olive we use, so I guess we need to learn how to press them if they ever start producing enough. We got our first couple on them last year and discovered why they are pickled before eating! I've never tasted anything so bitter!! That was also about the time I discovered the difference between black and green is harvest time.