-I don't know their variety
-I have read about several options, namely salt or vinegar.
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Diana B is a trusted home cook.
There are a lot of pages here, but if they omitted anything about olive curing, I'd be amazed: anrcatalog.ucdavis.edu/pdf/8267.pdf Also, if you Google "curing olives," you'll find a couple of videos and more.
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