Which of the following best describes the way minerals are classified?

• A. By the location where they are found
• B. By their physical state at room temperature
• C. By their color and luster only
• D. By their chemical composition and crystal structure

Answer: (D)

Verified step by step guidance

1. Understand that minerals are naturally occurring inorganic solids with a definite chemical composition and an ordered atomic arrangement, known as crystal structure.
2. Recognize that classification of minerals is primarily based on their chemical composition, which determines the types of atoms present and their proportions.
3. Know that the crystal structure refers to the specific geometric arrangement of atoms in the mineral, which affects its physical properties.
4. Note that while properties like color, luster, and physical state can help identify minerals, they are not the primary basis for classification because these properties can vary within the same mineral type.
5. Conclude that the best way to classify minerals is by combining their chemical composition and crystal structure, as this method reflects their fundamental nature and distinguishes one mineral from another.