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Origin and Properties of Oltu Gemstone Coal

open access: yesEnergy Sources, Part A: Recovery, Utilization and Environmental Effects, 2007
This study focuses on the origin and properties of the Oltu gemstone or Oltustone. The Oltu gemstone known as ' Black Amber' is dull-bright black color, and is very low ash, high volatile matter, total sulfur and calorific value.
Karayigit, ALİ İHSAN
exaly   +2 more sources
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