Both 4 and 5 4. Consider the following properties: color, clcavage, luster, hard
ID: 153022 • Letter: B
Question
Both 4 and 5
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.