Gemstone Quiz: Moss Agate to Diamonds

Ready to try the quiz? Read each question and choose one answer. Trust your first instinct. Then visit the answers page to check your picks and learn a bit more.

1. What gives moss agate its “mossy” look?

A) Trapped air bubbles
B) Green mineral inclusions
C) Surface scratches
D) Dye added during cutting

2. Which setting style best highlights the natural patterns in moss agate?

A) Bezel
B) Tension
C) Halo
D) Channel

3. Which gem is the modern birthstone for March?

A) Aquamarine
B) Peridot
C) Garnet
D) Tanzanite

4. How hard is sapphire on the Mohs scale?

A) 5
B) 7
C) 9
D) 10

5. What is alexandrite famous for?

A) Strong fluorescence only
B) Star effect only
C) Color change in different light
D) Magnetic response

6. In daylight, classic alexandrite most often appears…

A) Blue to violet
B) Green to bluish-green
C) Black
D) Clear

7. What is the key difference between natural diamonds and lab-grown diamonds?

A) Chemical makeup
B) Optical properties
C) Origin of formation
D) Ability to scratch glass

8. For maximum brilliance and fire in a diamond, which “C” should you prioritize?

A) Color
B) Clarity
C) Cut
D) Carat

9. The moonstone’s soft glow that seems to float under the surface is called…

A) Labradorescence
B) Adularescence
C) Chatoyancy
D) Dispersion

10. Which orange stone is often sold as “Mandarin” for its vivid color?

A) Garnet
B) Citrine
C) Fire opal
D) Carnelian

Ready to compare? Visit the answers page for explanations.