Green sphalerite with chalcopyrite and quartz

The unique specimen I never see for the last 30 years. It presents oxidated galena crystals and green transparent to translucent sphalerite (cleophane) developed on the surface of large quartz crystal and covers it almost completely. The unique property of that specimen is singeneticaly coating the surface of part of sphalerite crystals at the end of their crystallization and after that, as result, we have excellent golden color and irisation in some parts (reminding tiger eye). Excellent chalcopyrite coating forms planes in the crystals and helps for irisation. The surface coating also appears in some parts and makes specimen even more colorful.