Jewelry Making Gems And Minerals #490 August 1978How to carve in multiple gem materials; Sapphire collecting in Montana; Make a gemstone pillar clock; Enameling projects for jewelry makers. Magazine Gems, Jewelry-Making, Rocks & Minerals Jewelry Making Gems & Minerals Publisher: Gems and Minerals Date Published: August 1978Leave a ReplyCancel reply « Jewelry Making Gems And Minerals #476 June 1977 » Jewelry Making Gems And Minerals #492 October 1978