Inner Mongolian quartz cluster with sceptered points Coprolite like this tapered point

like this tapered point

Minerals like calcium carbonate precipitate (crystalize from the water) onto the surface of the mat

and is very bright when exposed to a powerful 365nm UV light

easiest to view in reflected light

The calcite contrasts beautifully with dark veining caused by pyrite

Inner Mongolian quartz cluster with sceptered points Coprolite like this tapered pointLocale: HuangGangLiang mining district, Inner Mongolia, China Approx point length: 2. 5" Approx weight: 47g These quartz points are from HuangGangLiang, and commonly called Mongolian or Inner Mongolian quartz. This isn't your typically shiny quartz crystal; this quartz cluster is the definition of pretty ugly, aggressively dull on the surface with intriguing patterns of glittering crystal faces on its surface. The piece is near opaque with inclusions,