Sulfur is (almost) always yellow, and there are a few others, but not many minerals have a fixed color Small amounts of impurities can drastically change a mineral's color Small amounts of impurities can drastically change a mineral's color
Sulfur - Element information, properties and uses ,
When sulfur burns in air, it generally forms sulfur dioxide or sulfur trioxide, the latter of which lacks any smell [amended from the podcast audio file, which states that sulfur dioxide does not smell] These compounds can further oxidize and rain out as sulfuric or sulfurous ac This is the mechanism for acid rain which has reeked havoc on .
Sedimentary Ore Deposits - substances are concentrated by chemical precipitation from lake or sea water; Although clastic sedimentary processes can form mineral deposits, the term sedimentary mineral deposit is restricted to chemical sedimentation, where minerals containing valuable substances are precipitated directly out of water
Manganese dioxide is a compound that occurs naturally as the mineral pyrolusite and it is used in water filtration systems to remove hydrogen sulfide by oxidizing and converting the gas to tiny particles of sulfur that can then be trapped inside the filter This high-purity media is also highly effective at oxidizing iron, precipitating it out .
The pig iron, limestone and iron ore go into an open-hearth furnace It is heated to about 1,600 degrees F (871 degrees C) The limestone and ore form a slag that floats on the surface Impurities, including carbon, are oxidized and float out of the iron into the slag When the carbon content is right, you have carbon steel