QUALITY
GRADDING
THERE ARE THREE TYPES OF GRADDING AVIALABLE IN MINERALS
A -FIRST QUALITY
B -SECOND QUALITY
C -THIRD QUALITY
D -WASTAGE
minerals
Minerals are substances that are formed naturally in the Earth. Minerals are usually solid, inorganic, have a crystal structure, and form naturally by geological processes. The study of minerals is called mineralogy. A mineral can be made of single chemical element or more usually a compound. TYPES With over 3,000 different types of minerals a system is needed to make sense of them all. ... The Dana system divides minerals into eight basic classes. The classes are: native elements, silicates, oxides, sulfides, sulfates, halides, carbonates, phosphates, and mineraloids. MINERALSMINERALS
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