Group of prismatic quartz crystals, to 6.5 cm, exhibiting two distinct generations of growth. Associated brassy chalcopyrite adds to the aesthetics. These used to be abundant on the marketplace in the 1990s and early 2000's but are now difficult to obtain. Note curved edges on prism faces as classic from the Boldut Mine. In excellent condition. Mined ca. 1998. Betty Kalaskie Collection #62.