Question

Beryllium, when combined with traces of chromium forms a gemstone called___________.
A.Ruby
B.Sapphire
C.Emerald
D.None of the above

Answer 1

We need to understand the reaction between Beryllium with trace amounts of chromium and predict the product so formed. Beryllium is a chemical element with atomic number $4$ and the symbol $Be$. It's a relatively uncommon feature in the universe, typically resulting from the spallation of larger atomic nuclei colliding with cosmic rays. The chemical element chromium has the symbol $Cr$ and the atomic number $24$. It's the first thing in the sixth category. It's a steely-grey transition metal that's lustrous, heavy, and brittle.

Complete answer:
We have to know that when beryllium is mixed with trace amounts of chromium, the gemstone known as the emerald takes on a stunning green hue. Emerald is a gemstone that is coloured green by small amounts of chromium and/or vanadium. On the Mohs scale, beryl has a hardness of $7.5 - 8$. Since most emeralds are strongly included, their durability (breakage resistance) is rated as low. The mineral emerald is a cyclosilicate.
Hence the correct option is option “C”.
The mineral corundum, or aluminium oxide, is used to make rubies. Rubies are created under the earth's surface when they are subjected to intense heat and pressure. This is how rubies are shaped and get their deep red colour.
Therefore, option “A” is incorrect.
Sapphires are made from corundum, a mineral that is a crystallised form of aluminium oxide. Corundum is formed in crystalline rocks that contain sapphires or rubies due to the presence of other minerals during formation.
Therefore, option “B” is incorrect.

Note:
We must be noted that Emerald is a gemstone and a beryl $\left( {B{e_3}A{l_2}{{\left( {Si{O_3}} \right)}_6}} \right)$ variety that is coloured green by small amounts of chromium and/or vanadium. The distinction between traditional emeralds (made with traces of chromium) and modern vanadium emeralds is often expressed in the use of words like "Colombian emerald" in the United States.