what rock ore is chromium in

Ore - Wikipedia

An ore is an occurrence of rock or sediment that contains sufficient minerals with economically important elements, typically metals, that can be economically extracted from the deposit. The ores are extracted from the earth through mining; they are then refined (often via smelting) to extract the valuable element, or elements.. The grade or concentration of an ore mineral, or metal, as well ...

Chromite - Wikipedia

Chromite is found as orthocumulate lenses of chromitite in peridotite from the Earth's mantle.It also occurs in layered ultramafic intrusive rocks. In addition, it is found in metamorphic rocks such as some serpentinites. Ore deposits of chromite form as early magmatic differentiates. It is commonly associated with olivine, magnetite, serpentine, and corundum.

Rocks & Minerals Definitions

Actinolite Actinolite has the formulae Ca2(Mg,Fe)5Si8O22(OH)2 and a relative hardness of 6. It commonly occurs in crystalline schists, often being the chief constituent of …

Investing in Mining Stocks, Metals and ... - InvestmentMine

Comprehensive mining investment information. The latest metal prices, mining stock and market data, commodity warehouse levels and investing news.

Rock and Mineral Uses from Rockman

Feldspar — Feldspar is a rock-forming mineral. It is important industrially in making glass, ceramics, enamelware and soaps. It is also used in making bonding material for abrasive wheels, cements, fertilizer, tarred roofing materials and as a sizing or filler in textiles and paper.

IMPORTANT ORE MINERALS - Mineralogy, Petrology and ...

Most elements need to be concentrated into amounts that can be economically mined from ore deposits (usually hundreds to thousands of times their crustal abundance).

The World Factbook — Central Intelligence Agency

The Office of Public Affairs (OPA) is the single point of contact for all inquiries about the Central Intelligence Agency (CIA). We read every letter, fax, or e-mail we receive, and we will convey your comments to CIA officials outside OPA as appropriate.

Labrador Iron Mines Holdings Limited :: Iron Ore Products ...

Iron Ore Products & Markets. Iron ore is the raw material required to make pig iron, which is the primary (98%) raw material used to make steel.

Pegmatites and aplites: Their genetic and applied ore …

Definition: The term “ore” is defined in the current study to describe a concentration of non-metallic, e.g., feldspar, or metallic minerals, e.g. spodumene, in pegmatitic rocks irrespective of its structure and position in the deposit which was or is currently mined for a profit.

London Metal Exchange Nickel Prices, Stainless Steel ...

Free daily nickel and stainless steel prices, world metals market news, free base metals reports