kalkbeschichtete stones

I really wanted to have white stones. Some are really quarzig know others are like gray flints. All together have been delivered in a plastic bag in carton. That's OK. Only in this Plasticksack (welded) were stones rolled in wet lime powder, or coated .... a few I've washed them first to clean ... that was not a good idea, the stones showed their true "face", they were gray .... so then do not wash and in the Planzentopf ... dried lime and bricks are not know, but look white .... so now careful with casting ... 3 stars because only coated stones , but the price was down set, otherwise rather 2 stars .... different than expected ... the touch of white hands like chalk ...