Jewelry Design Gemstones and Precious Stones

Question 1

Which gemstone hardness scale is universally used in jewelry to rate scratch resistance?

Accepted Answer

Mohs Scale

Answer

Vickers Scale

Answer

Rockwell Scale

Answer

Brinell Scale

Question 2

What is the term for the weight unit used to measure gemstones?

Accepted Answer

Carat

Answer

Gram

Answer

Grain

Answer

Ounce

Question 3

Which of the following is NOT a variety of corundum?

Accepted Answer

Emerald

Answer

Ruby

Answer

Sapphire

Answer

Padparadscha

Question 4

What optical phenomenon causes a star-shaped light pattern in certain gems like star sapphires?

Accepted Answer

Asterism

Answer

Chatoyancy

Answer

Adularescence

Answer

Labradorescence

Question 5

Which treatment is most commonly applied to emeralds to improve their clarity?

Accepted Answer

Oil or resin filling

Answer

Heat treatment

Answer

Irradiation

Answer

Fracture sealing with glass

Question 6

What is the name for the category of gemstones that includes diamonds, rubies, sapphires, and emeralds?

Accepted Answer

Precious stones

Answer

Semi-precious stones

Answer

Ornamental stones

Answer

Mineral gems