Nestled in a basaltic vug, lined with under 1.0 cm across rosettes of light gray stilbite, are several clusters of royal blue, lustrous, cavansite. Common enough...but the MAJOR RIBBON OF CAVANSITE RUNNING OVER 3 INCHES (8 cm) DOWN THE MIDDLE IS NOT COMMON AT ALL! This unusual elongated chain of cavansites is the longest such chain of crystal clusters I can recall seeing in all these years since they sttarted coming out in the early 1990s in any quantity. The photo seems to distort the piece and make the ribbon/river of cavansite look like it only goes just pass the middle. It probably extends just over 2/3 of the way down. the color is intense, top class, and it is pristine....overall, just a very dramatic piece!