Q. Lapis lazuli is
A) Sodium alumino silicate
B) Copper sulphate
C) Zinc sulphate
D) Ferrous sulphate
Explanation
(a)
Lapis lazuli is a rock composed mainly of the following mineral, lazurite, hauynite sodalite, nosean, calcite pyrite. Lapis lazuli is actually sulphur containing, sodium aluminium silicate having chemical composition
$3Na_{2}O \bullet 3Al_{2}6SiO_{2} \bullet 2Na_{2}S$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.