Mineral Hardness and Properties

The video explains that the mineral has a hardness of seven on the Mohs scale, indicating its durability. In its crystalline form, the mineral is very clear, highlighting its purity and transparency.

What is the hardness level of the mineral mentioned?

• Eight

• Six

• Seven

• Five

Which of the following is a characteristic of a mineral with a hardness of seven?

• It is softer than talc

• It is as hard as quartz

• It can be easily scratched by a knife

• It is harder than diamond

How does the mineral appear in its crystalline form?

• Very clear

• Colored

• Opaque

• Cloudy

What is a common property of minerals in crystalline form?

• They are always metallic

• They are always colored

• They are always opaque

• They are often clear

Which mineral property is being described if it is said to be 'very clear'?

• Luster

• Hardness

• Clarity

• Density