as far as I know they are they were left to me after my dad passed away and I've never done anything with them. they have just been sitting in my jewelry box for the past 8 years hope that helps thanks.
some of them are quartz ,some are CZ, one is amethyst colored I'm not sure if it's a real amethyst or not, some of the yellow one are called citrine quartz I think. I've never had them looked at or anything