Both 4 and 5 4. Consider the following properties: color, clcavage, luster, hard

Question

Both 4 and 5

4. Consider the following properties: color, clcavage, luster, hardness, density, streak. Sulfide minerals ati ia have a wide variety of properties, but most of them have one property in common that they don't share with most other minerals. What is that property and why do sulfide minerals in particular have it? 5. in conurast, most oxide minerais tinciuding ones we haven't examined, like corundum), possess one property in common. What is this property and why do oxide minerals generally possess it?

Explanation / Answer

4. Sulphide minerals have metallic lustre in common. That's a distinguishing feature for them. This is due to the free electrons present, which reflect the incident light that falls on them.

5. Oxides have higher hardness in common as they are resistant to abrasion or scratching. Corrundum is the hardest oxide mineral listed above diamond in Mohs scale of hardness.

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