A group of minerals whose chemical compound consists of a halogen with a more electropositive element or group
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Category: <span>H</span>
Term used to describe a radioisotopes decay to 50% of its current energy
Sections of ore which contain high economic concentrations of target minerals
Consisting of not one but various elements
Exactly half of a sphere
A geologic process occurring inside or below the Earths crust
An common oxide of iron, and form of iron ore, which takes a high polish and is frequently in gemstones and jewelry
A substance containing water
A group of metals from copper to bismuth on the periodic table of elements, or any element with a specific gravity of 4 or more
A prefix describing a glassy characteristic