A metallic mineral found in nature and being relatively pure
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Tag: <span>N</span>
The hard, smooth and iridescent inner layer of a mollusk shell, a source of calcium carbonate
Term used to describe a large shallow water body, usually in fossil deposits where mollusk shells are found in some concentration
A dike filled by compacted sedimentary materials including sand and gravels
A hexagonal feldspathoid mineral, (Na,K)AlSiO4
Lava that cools in the conduit of a volcano
A small loose alluvial mass of near pure gold or platinum metal
A compound, mineral or area that does not contain sufficient quantities of iron to be detected or targeted for iron
Small, round discrete masses of a mineral type, usually found within or displaced from another mineral
A group of metals with high resistance to oxidation and chemical dissolution, including mercury, gold, rhenium and platinum group elements