kyanite and sillimanite
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Two examples of index minerals are kyanite and staurolite. These minerals are used by geologists to determine the metamorphic grade of a rock based on their presence and abundance.
forms only in a sedimentary rock
None present. Periodic table lists elements, not minerals.
Index minerals are specific minerals that form under certain pressure and temperature conditions, making them useful in determining the metamorphic grade of rocks. By identifying the presence of index minerals in rocks, geologists can infer the pressure and temperature conditions the rocks have experienced, helping them understand the geological history of an area. This information can be used to reconstruct past tectonic events, infer the depth of burial, and identify the thermal history of a region.
What is halide mineral
Examples: density, hardness, boiling point, refractive index.