1 / 5 |
What is the famous saying about Alexandrite’s colour change?

• Ruby by day, emerald by night
• Emerald by day, ruby by night
• Sapphire by day, topaz by night
• Opal by day, diamond by night

2 / 5 |
What is amber made from?

• Hardened lava
• Crystallized salt
• Fossilised ancient tree sap
• Compressed sand

3 / 5 |
Peridot was discovered in comet dust brought back by which space probe?

• Stardust Space Probe
• Voyager 1
• Apollo 11
• Hubble

4 / 5 |
Who officially named Tanzanite after Tanzania in 1967?

• Cartier
• De Beers
• Bvlgari
• Tiffany & Co.

5 / 5 |
What is used to measure the hardness of gemstones?

• Richter Scale
• Mohs’ Scale
• Newton’s Scale
• Crystal Index