Gems and Minerals Magazine #491 September 19781978 Directory Magazine Gems, Rocks & Minerals Gems & Minerals Publisher: Gemac Corp Date Published: 1/1/1978 ISBN: B01F8J14I4 Number of Pages 184Leave a ReplyCancel reply « Gems and Minerals Magazine #313 October 1963 » Gems & Minerals Magazine #330 March 1965