Top photograph: large ZEKTZERITE (crystal is 3.7 cm) Bottom photograph: Large 3.7 cm ZEKTZERITE (right), smaller ZEKTZERITE (left) and lab grown ZEKTZERITE (center). Bottom photograph was taken under shortwave ultraviolet light. The lab grown crystal shows the brightest fluorescence. Golden Horn Batholith, Washington Pass, Okanogan County, Washington, USA Jack Zektzer collection at time of photos © Markus Raschke |