Free CGC Gemstone Identification & Classification Questions and Answers

Question 1

What is the main characteristic used to classify gemstones?

Accepted Answer

Chemical composition

Answer

Color

Answer

Hardness

Answer

Origin

Question 2

Which gemstone is known for its hardness of 10 on the Mohs scale?

Accepted Answer

Diamond

Answer

Ruby

Answer

Sapphire

Answer

Emerald

Question 3

What gemstone is most commonly associated with healing properties?

Accepted Answer

Amethyst

Answer

Topaz

Answer

Quartz

Answer

Turquoise

Question 4

What is the term for the effect where a gemstone exhibits a cat's-eye appearance?

Accepted Answer

Chatoyancy

Answer

Asterism

Answer

Lustre

Answer

Brilliance

Question 5

Which of these gemstones is classified as a precious gemstone?

Accepted Answer

Ruby

Answer

Opal

Answer

Garnet

Answer

Amethyst

Question 6

Which gemstone exhibits pleochroism, showing different colors when viewed from different angles?

Accepted Answer

Tanzanite

Answer

Ruby

Answer

Diamond

Answer

Opal

Question 7

Which gemstone is known for its brilliant green color?

Accepted Answer

Emerald

Answer

Ruby

Answer

Sapphire

Answer

Diamond

Question 8

What gemstone is most commonly associated with healing properties?

Accepted Answer

Amethyst

Answer

Topaz

Answer

Quartz

Answer

Turquoise

Question 9

Which gemstone is known for its blue color and is a symbol of wisdom and royalty?

Accepted Answer

Sapphire

Answer

Emerald

Answer

Aquamarine

Answer

Amethyst