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UV reactivity The calcite fluoresces a weak white under 365nm UV light
they are pretty convincing as coprolites
most pieces glowing a strong green under 365nm UV light
meaning composed of small spheres that cover the surface
The soft matrix on the back will leave red-brown dusty staining on surfaces
Inner Mongolian quartz long point pair Prehnite UV reactivity The calcite fluorescesLocale: HuangGangLiang mining district, Inner Mongolia, China Approx point length: 3. 75" Approx weight: 40g These quartz points are from HuangGangLiang, and commonly called Mongolian or Inner Mongolian quartz. This isn't your typically shiny quartz; this pair of long straight points is completely coated in a dull mineral crust. On one side, the piece displays two elegant sleek long quartz crystals. Broken ends reveal the first generation of growth
