Discover the intricate art of filigree jewelry with this issue of Jewelry Making Gems and Minerals from July 1981. Immerse yourself in the collection of Idaho's Sky Blue Opal, and learn the lost wax casting technique in part 2 of the series. Explore the state rock of California, Serpentine, and the significance of Jade in Mexico. This publication caters to hobbyists and crafts enthusiasts who are passionate about gems, minerals, and lapidary.  Whether you are a subscriber or a one-time reader, this issue is a valuable addition to your collection.