Which among the following precious stones have most similar chemical composition?
Choose the correct option from the codes given below:
Ruby is mineral corundum, an Aluminium oxide (a-Al2O3) and so is sapphire. Emerald is Beryllium Aluminium cyclosilicate (Beryl). So 1 & 2 are closest to each other.
This question is a part of GKToday's Integrated IAS General Studies Module