Jasper, an aggregate of microgranular quartz and/or chalcedony and other mineral phases,Kostov, R. I. 2010. Review on the mineralogical systematics of jasper and related rocks. – Archaeometry Workshop, 7, 3, 209-213. PDF is an opaque, impure variety of silica, usually red, yellow, brown or green in color; and rarely blue. The common red color is due to iron(III) inclusions. Jasper breaks with a smooth surface and is used for ornamentation or as a gemstone. It can be highly... meer
Deze site maakt gebruik van cookies. Voor meer informatie volgt u deze link. Hierop is meer te lezen over welke cookies wij plaatsen en waarom en welke mogelijke '3rd-party' cookies er bij kunnen komen.
