Henny Meena. Diamonds. November 08th , 2017.
Three-stone setting: This is a very common setting. The oval cut in the center is surrounded by two smaller stones.The side ones are generally emerald or pear-shaped.
Diamonds, in their crude form, are either octahedral, rhombic, cubic, or mackle in shape. Sharp cuts are made on them in an attempt to maximize the angle of refraction, while at the same time focusing on increasing their transparency. The different styles of diamond cutting include brilliant cut, step cut, rose cut, and mixed cut. Of these, the brilliant cut is the sharpest, and hence also the most noticeable.
Diamonds are formed under tremendous heat and pressure. These conditions exist at about 150 to 200 km beneath the Earth's surface, where the temperatures are extremely high ranging from 900 C to 1300 C. For millions of years, carbon atoms deep in the Earth's upper mantle have been exposed to these extreme conditions. As a result, these atoms combine their cubic molecular form, and they ultimately form diamond crystals. During volcanic eruptions, these crystals eventually make their way to the Earth's surface through pipes and channels. These passageways contain the magma from the volcano, which rises along with the diamonds, and deposits them on the surface where they are later found and mined. These are known as the primary deposits of diamond. The igneous rock called kimberlite is the most common host of diamonds found in the earliest volcanic pipes.
Take a bowl and pour a cup of lukewarm water into it. Mix cup of ammonia in the bowl and keep the ring in the solution for at least three to five minutes.
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