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Some of us who have been acquainted with the present methods of production of metals, and who have had an opportunity to witness the impact of some of the newer chemical techniques on metallurgy, have become convinced that it is possible to consider seriously the treatment of sulfide minerals by strictly chemical methods as distinct from pyrometallurgical
Named for Dr. Adolf Peretti, the mineral's discoverer, who is (as of 2015) head gemologist and director of GRS Gemresearch Swisslab AG (Adligenswil, Switzerland).
The mineral is steel gray with black streak and metallic luster. It is brittle and strongly magnetic. It has no cleavage. Ddquot; 6.45, VHN(50) 633494 kglmmr. Under reflecred light the mineral is gray with a yellow tint. It is moderately anisotropic from bluish gray to pale brown. Pleochroism is absent.
helping to increase the absorption and bioavailability of the mineral element. The esterified fatty acids are essentially emulsifiers used to obtain a better stabilization between the water (aqueous phase) and oil (fatty phase) phases, which is essential for improving absorption via
Orpiment is a monoclinic arsenic sulfide with a yellow orange color and a chemical composition of As 2 S 3. It has a Mohs hardness of 1 1/2 to 2 and is easily ground into a yellow to yellow orange powder.
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Metallogenic Belt and Mineral Deposit Maps of Northeast Asia . Compiled by Alexander A. Obolenskiy, Sergey M. Rodionov, Gunchin Dejidmaa, Ochir Gerel, Duk Hwan Huang,
Indicates mineral may be doubtful at this locality. Good crystals or important locality for species. World class for species or very significant. (TL) Type Locality for a valid mineral species. (FRL) First Recorded Locality for everything else (eg varieties). Struck out