The Yakut Stone is actually the Persian name for the Neelam Stone which is a Blue Sapphire...
Zeus did not turn Dione to stone, Niobe was turned to stone out of pity.
Stellar Stone ended in 2006.
it is made out of igneous granite
A stone has a solid mass and does occupy space.
11mm x 11mm = 121 mm2
11mm=1.1cm
Yes, 11mm is smaller.
Your answer depends on the type of stone and the cut. The measurements you give are approximate to a sort-of princess cut, but the measurements you give are not 'true' for the ratios defined by the cut. Your local jeweler or certified gemologist can weigh the stone for you and give you its carat weight and type.
11mm
1.1
no
As long as it has an 11mm ring mount then Yes. And I think it does, or you can order 11mm scope rings for the scope.
1.1cm
0.011 metres
Yes.
42mm