Quartz var. Japan Law twin

Mount Teneriffe forms part of a mountain chain in western Washington state, east of Seattle, and is a locality known for well crystallised Quartz found amongst a breccia on its north face. This interesting small miniature has several transparent terminated Quartz crystals covering a sawn granitic matrix. The saw cut provides a good and stable base and is not apparent once displayed. The dominant feature is a roughly 90 degree offset pair of gemmy Quartz crystals, measuring 2.7 and 2.4 cm long from the common base. These are noted on the accompanying old label as a Japan Law twin (typed “Japanese twin”), but I feel this must be treated with caution. It could be, but the re-entrant angle does not appear close to meeting the criteria of this twinning law. Whatever, it is a beautiful pair of transparent and gemmy Quartz crystals, of the variety Rock Crystal. This specimen is from the Josef Clemente Collection of southern Germany.