Final answer:
Dolomite is a primary mineral found in igneous rocks and can be measured using the Mohs scale for hardness.
Explanation:
Dolomite can be classified as a primary mineral as it is found in igneous rocks. The unit for measuring the hardness of a mineral is the Mohs scale, which compares the hardness of minerals based on their ability to resist abrasion or scratching. Hardness is a crucial characteristic for mineral identification and is related to the mineral's atomic bonds and crystalline structure.
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