Why Do Some Beaches Have Black Sand? The Volcanic Secret? Discover the intriguing reasons behind the creation of black sand ...

Below 112 metres depth the hole contains increasing "Seel-Breccia” style mineralization characterized by quartz-carbonate veins and breccia matrix with variable proportions of chalcopyrite, pyrite, ...

The radioelement-bearing pegmatite is characterized by aggregates of black biotite interstitial to feldspars and quartz. The biotite aggregates are the loci for very fine-grained euhedral uraninite ...

Green, epidote-altered muscovite and black, columnar tourmaline set in quartz ... with 3 x 5 cm green muscovite books and graphic-textured feldspar. The Company is prioritizing exploration ...