Which one of the following gemstones contains beryllium metal?
Topaz
Emerald
Ruby
Blue sapphire
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC CAPF – 2018
– Topaz: Aluminium and fluorine silicate (Al₂SiO₄(F,OH)₂). Contains Aluminium, Silicon, Oxygen, Fluorine, Hydrogen.
– Ruby and Blue Sapphire: Both are varieties of the mineral corundum, which is aluminium oxide (Al₂O₃). Ruby is colored by chromium, and sapphire by iron and titanium.
Thus, out of the given options, only Emerald contains beryllium.