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Halide

A group of minerals whose chemical compound consists of a halogen with a more electropositive element or group

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High Grading

Sections of ore which contain high economic concentrations of target minerals

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High grade

Sections of ore which contain high economic concentrations of target minerals

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Hypogene

A geologic process occurring inside or below the Earth’s crust

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Hematite

An common oxide of iron, and form of iron ore, which takes a high polish and is frequently in gemstones and jewelry

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Hyalo

A prefix describing a glassy characteristic