Sci-Five | The Hindu Science Quiz: On Gemstone
1 / 5 |
What is the well-known saying about Alexandrite’s color change?
- Ruby by day, emerald by night time
- Emerald by day, ruby by night time
- Sapphire by day, topaz by night time
- Opal by day, diamond by night time
Alexandrite shines purple in lamplight and inexperienced in daylight; therefore, the saying “emerald by day, ruby by night”.
Next
2 / 5 |
What is amber created from?
- Hardened lava
- Crystallized salt
- Fossilised historical tree sap
- Compressed sand
Amber is an natural gem that’s created from hardened and fossilized historical tree sap.
Next
3 / 5 |
Peridot was found in comet mud introduced again by which area probe?
- Stardust Space Probe
- Voyager 1
- Apollo 11
- Hubble
In 2005, the Stardust Space Probe returned to Earth lined in comet mud that contained peridot particles.
Next
4 / 5 |
Who formally named Tanzanite after Tanzania in 1967?
- Cartier
- De Beers
- Bvlgari
- Tiffany & Co.
Tanzanite was formally named after the nation of Tanzania the place it’s discovered by Tiffany & Co. in 1967 when it was first unearthed.
Next
5 / 5 |
What is used to measure the hardness of gems?
- Richter Scale
- Mohs’ Scale
- Newton’s Scale
- Crystal Index
Gemstones are graded for his or her hardness on what is called “Mohs’ Scale”. Amber is the softest gemstone, diamond is the toughest.
Next
Published – March 27, 2025 05:30 pm IST
