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In addition, it must be hard and durable. Its value increases if it is also rare.The beauty of a gem is measured in terms of its clarity, brilliance, and color. Comments
A mineral must: 1. be created naturally 2. be solid 3. have a crystalline structure 4. be homogeneous 5. have a definite chemical composition. 5 Characteristics Of A Mineral. Five Characteristics Of A Mineral. This Site Might Help You.