Rock Crystal Published 14th November 2007 Topics Lucerne, Nature Museum, Rock Crystal, Switzerland Leave a comment Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Notify me via e-mail if anyone answers my comment. Δ This site uses Akismet to reduce spam. Learn how your comment data is processed.