A heavy, dense, rare element of the platinum group. Symbol, Rh
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Tag: <span>R</span>
Rare mineral and metallic elements such as niobium, yttrium, Lanthanum, cerium, praseodymium, neodymium, samarium, thulium, ytterbium, neodymium, dysprosium, gadolinium, promethium, scandium and lutetium
A fine-grained, extrusive igneous rock, having parallel mineral composition with granite
A shaft or room that has been excavated from the ground upward
A heavy, dense and rare, silvery-white precious metal. Symbol, Re
The heaviest radioactive gas element, symbol, Rn
Land adjacent to a large waterbody, connected in the same watershed
A uranium prospecting technique which detects traces of radon gas
The extent of mineralization by size and value, calculated by sound volumetric procedures
Samples large enough to contain a similar percentage of mineral constituents of the host rocks from which it was removed