Light is not a term usually used to describe diamonds -- but literally, the lightest diamond would be the diamond with the least weight.
the lightest elements are gases and the lightest of these are hydrogen and helium.
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The lightest house is the lighthouse.
The lightest metal is lithium.
The superlative form of the adjective 'light' is lightest.
Hydrogen is the lightest element. The isotope protium is the lightest kind of hydrogen atom.
ANSWER:The ant is the lightest animal in the world.
Hydrogen was, and is, the lightest gas
No hydrogen is the lightest element.
The 4H is the lightest pencil.
Select soccer balls are the lightest
Lithium is the lightest.