How to tell if a ball is crystal or glass?
Ok here are some links which will help you understand, basically I could cut and paste too but the links would be more informative to you, just to add before you start reading actually the Crystal which you are taking about is Lead crystal(also added wiki page of Lead crystal for your GK):- http://en.wikipedia.org/wiki/Lead_crysta… http://reviews.ebay.ca/Crystal-vs-Glass-… http://www.wisegeek.com/what-is-the-diff… http://www.funtrivia.com/askft/Question2… Also just to add as after reading you may or may not have figured that other than refractive index, as you may have seen the way jewellers check with the s