I'm updating the link because that domain has been taken over by a marketing firm and I've moved to anew domain the links to the pages on color are well down the page in section 3 http://pjentoft.com/0crystal-healing.html
I being more free with crystal properties these days it as though the corespondences between crystal color and healing property /purpose have changed or expanded recently. Perhaps we need new systems and interpretations for the new and evolving reality and time.