Electrostatic separator, Electrum, Eluvium

• Effervesce: Forming and breaking gas bubbles by chemical reaction.
• Electrostatic separator: Machine employing static electrical charges to separate heavy mineral concentrates.
• Electrum: Native gold containing a large amount of alloyed silver. A naturally occurring, deep-yellow to pale-yellow alloy of gold with silver; argentiferous gold, containing more than 20% silver
• Element: Substance composed of atoms that cannot be broken down by ordinary chemical means; metals, nonmetals and certain gases.
• Eluvium: Material produced by decomposing rock formations where water movement and abrasion are not present.
• Emulsion: A mixture of water and oily substances.
• End line: Line across the width of a lode chain.
• Entry: Refers to mining location; also opening to underground workings.
• Erosion: The weathering disintegration and movement of rocks and soils. The group of physical and chemical processes by which earth or rock material is loosened or dissolved and removed from any part of the Earth's surface. It includes the processes of weathering, solution, corrosion, and transportation.
• Evaporate: Drying out; also refers to the dry product.
• Exchange for Physical(EFP): A simultaneous trade between traders wherein one trader buys the physical and sells the futures contracts while the other trader does the opposite. Prices for EFP transactions are mutually agreed upon by both traders.
• Exploration: Prospecting, sampling, mapping, diamond drilling and oth er work involved in searching for ore. Exploration can be divided into three basic categories:
  Grassroots Exploration: Exploration for ore in an area that has the correct geologic setting, although no ore may have been found yet in that precise location. Headframe Exploration: Exploration for a separate ore body "within sight of the headframe" of an existing mine.
• Definition Exploration: Exploration that defines an ore body or searches for extensions to it, once it has been discovered.
• Exposure: An outcrop of ore or a rock alluvial; Sand and gravel laid down by water movement.
• Extraction: (a) The process of mining and removal of coal or ore from a mine. (b) The process of dissolving and separating out specific constituents of a sample by treatment with solvents specific for those constituents.
• Extralateral right: Right to minerals beyond side lines of mining claims.
• Extrusive: Igneous rocks that cooled at or above the earth's surface.
• Exude: To ooze out, or emit an odor.