CLEAN : Protesters gather outside Sri Lanka president's office in Colombo

What is a diamond primarily composed of?

• Silicon

• Carbon

• Gold

• Iron

Which property of diamonds makes them the hardest natural material?

• Their crystal structure

• Their color

• Their size

• Their weight

Which of the following is NOT a property of diamonds?

• Hardness

• High electrical conductivity

• High thermal conductivity

• Transparency

In which industry are diamonds most commonly used?

• Jewelry

• Automotive

• Textile

• Agriculture

What is one cultural significance of diamonds?

• They are used in food preparation

• They are a source of energy

• They are used in construction

• They symbolize wealth and status