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Iron and steel - Introduction to their science, properties, uses
An easy-to-understand introduction to iron and steel, what they are, how they're made, the various different types, and how we use them.
Rocks & Minerals Definitions
Obsidian Obsidian is volcanic glass. Oligoclase Oligoclase has the formulae (Na,Ca)AlSi3O8 and a relative hardness of 7. It is a plagioclase feldspar.Of interest to petrologists and collectors.
Geology Terms – Resource Opportunities
Porphyry Deposits Every investor in the mining industry has heard about porphyry deposits, yet few understand the significance of the term. Porphyry deposits are often enormous in size, representing the most important source of copper and one of the leading sources of gold.
Gemstone Terminology - Earth Mother Crafts
Terminology *Information regarding gemstone lore and metaphysical properties has been compiled from various sources and is for entertainment purposes only.
Photos of Natural Copper Ore, Copper minerals, Crystal ores ...
Native copper: This is man's first copper ore. Native copper is often alloyed with gold, silver, lead and mercury.Copper is widely distributed in nature. The metal is easily oxidizable and also easily reduced.
A review on the adsorption of heavy metals by clay minerals ...
A review on the adsorption of heavy metals by clay minerals, with special focus on the past decade
Nickel Mines in the Philippines – PANDI Claims Management Inc.
Caraga Region is located at northeastern part of Mindanao. It has five (5) provinces, namely: Dinagat Province, Surigao del Norte, Surigao del Sur, Agusan del Norteand Agusan del Sur. Caraga Region is now hosting several mining projects producing various mineral commodities particularly but not limited to gold, copper, chrome, nickel, iron and ...
Lateritic nickel ore deposits - Wikipedia
Lateritic nickel ore deposits are surficial, weathered rinds formed on ultramafic rocks. They account for 73% of the continental world nickel resources and will be in the future the dominant source for the mining of nickel.
Hematite - sandatlas.org
But far more important is the use of hematite as an ore of iron. The majority of it is mined from banded iron formations (BIF). These are old (formed generally more than 2 billion years ago) layered metasedimentary iron-silica rocks where the iron-bearing layers are composed of either hematite or magnetite.
Rocks & Minerals Definitions
Feldspar Feldspar refers to a group of minerals containing aluminum and silica.They all show good cleavage in two directions at about 90 degrees. The hardness is about 6 and the specific gravity between 2.5 - 2.8.
Saprolite - Wikipedia
Saprolite is a chemically weathered rock. Saprolites form in the lower zones of soil profiles and represent deep weathering of the bedrock surface. In most outcrops its color comes from ferric compounds.
The Color of Art Pigment Database: Pigment Yellow - PY
the Color of Art Pigment Database - the Pigment Yellow page of the database is a complete artists pigment reference, with color Index names, pigment chemical composition, lightfastness, safety and other information on artists pigments and paint.
Goethite | mineral | Britannica.com
Goethite: Goethite,, a widespread iron oxide mineral [α-FeO(OH)] and the most common ingredient of iron rust. It was named in 1806 for J.W. von Goethe, a German poet and philosopher with a keen interest in minerals.
Study on kinetics of thermal decomposition of low LOI ...
Study on kinetics of thermal decomposition of low LOI goethetic hematite iron ore