The Museum of London's Extraordinary Cheapside HoardRobert Weldon and Cathleen JonathanOn the Origin of Digit Patterns in Gem OpalBenjamin Rondeau, Jean-Pierre Gauthier, Francesco Mazzero, Emmanuel Fritsch, Yves Bodeur, and Boris ChauvireAgates from Sidi Rahal, Morocco: Gemological Characteristics and Proposed OriginMagdalena Dumanska-Słowik, Lucyna Natkaniec-Nowak, Aleksandra Wesełucha-Birczyńska, Adam Gaweł, Marek Lankosz, and Paweł WróbelUseful Visual Clue Indicating Corundum Heat TreatmentJohn I. KoivulaThree Occurrences of Oregon SunstoneDuncan Pay, Robert Weldon, Shane McClure, and Kevin SchumacherEvery issue also includes the most up-to-date reports from the GIA Laboratory (Lab Notes) and gemologists around the world (Gem News International). GIA students and alumni save 10% on back issues! Enter coupon code GGALUM at checkout.Usually ships in 3-5 business days. SKU: 4301304
