Particulate minerals, usually gold
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Category: <span>F</span>
A polished surface of a gemstone or rock
Natural or manmade materials used to fill cavities created for the exploration or development of more valuable mineral substances
The exposed end or start of a mineral body
The initial reconnaissance of geology performed by direct observation
Visual and preliminary classification of rock samples collected on-site, prior to formal geochemical analysis
Minerals that occur in strings, strands, threads or fibers, such as asbestos
A terms used to describe a substance containing iron
A term that describes light-colored volcanic rocks containing feldspar
A group of common igneous rocks with constituent elements forming minerals that includes microcline, orthoclase, plagioclase and others