Question

What impurity is present in black diamonds?

Answer 1

Hint: There are many types of diamonds available in nature, such as white diamond, blue diamond, champagne diamond, blue diamond, etc. Black diamond is one type of diamond that is found in nature. Impurity here can mean two things, either that due to which impurity the diamond shows a colour or the impurity found in that specific diamond.

Complete answer:
Two impurities can be persisted in black diamonds, one can be the impurity due to which the black diamond gets its colour, and another one determines what impurity is present in a black diamond.
Let us first see due to which impurity the diamond shows black colour.
Diamonds are made up of only one element, carbon. Carbon atoms are connected to each other with covalent bonds in a diamond.
The purest form of diamond is a colourless diamond. The diamonds that have different colours have impurities which gives them their colour. In the case of black diamond, graphite is present along with the octahedral crystal structure.
Thus, graphite can be called as an impurity for diamond due to which it shows black colour. Another impurity might be present in it is copper oxide, due to this the structure of black diamond gets disturbed.
Therefore, these two might be considered as impurities in black diamonds.
Black diamond is also commonly known as carbonado. Along with diamond structure and graphite, it also contains amorphous carbon and very minute metal inclusions. This type of diamond is the most porous, other diamonds have less or no pores in them.

Note:
Black diamonds have a unique composition, they have graphite and amorphous carbon along with diamond. They are not found in kimberlite like other diamonds, they are only found in younger rock formations and only near natural sources of water.