What is diamond answer?
Diamond is an allotrope of carbon in which the carbon atoms are arranged in a diamond cubic crystal lattice. ... This allotrope of carbon is made in the upper mantle of the Earth. It is entirely made up of carbon (just like graphite and coal). This arrangement of carbon atoms arises due to immense heat and high pressure.
What is Diamond 4C?

Beautiful. Rare. Cherished. Each diamond is unique and is a miracle of time, place and change. And each has specific qualities that establish its value.

Until the middle of the twentieth century, there was no agreed-upon standard by which diamonds could be judged. GIA created the first, and now globally accepted standard for describing diamonds: Color, Clarity, Cut and Carat Weight. Today, the 4Cs of Diamond Quality is the universal method for assessing the quality of any diamond, anywhere in the world. The creation of the Diamond 4Cs meant two very important things: diamond quality could be communicated in a universal language, and diamond customers could now know exactly what they were about to purchase.

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