Rare Calcium isotope costs â¹3.2 crore per 2 grams
Calcium-48, a rare isotope of the element Calcium, costs over â¹3.2 crore for just 2 grams. The isotope, which makes up just 0.187% of the naturally occurring Calcium on Earth, is extracted using atom-by-atom separation from normal Calcium. The isotope is used in the synthesis of superheavy elements, which usually have very short half-lives.