Image and caption from Luke Meaney, James Madison University in Harrisonburg, VA. Hornblende andesite from Mt. Shasta, CA. A near perfect Hornblende in Cross-polarized light. See the third order pinks, blues, greens, and yellows so vibrant, Picasso would approve. #thinsectionthursday #hornblende

https://www.wacoca.com/media/654316/ Book Review: Collector’s Guide to the Amphibole Group #amphibole #book #books #collectors #crystallography #edenite #formation #gem #gemology #geology #hornblende #JADE #joesmithite #Lauf #mineral #mineralogy #nephrite #Palke #pargasite #review #richterite #書籍