Mari Holzer. Diamonds. May 21st , 2017.
Thomas Cullinan was a building contractor from Johannesburg. He purchased the property of Willem Prinsloo, the 'Elandsfontein Farm' in South Africa, for 52,000 pounds and established a mining company on 1st December, 1902. Thomas Cullinan named the company as Premier Diamond Mining Company Limited. Cullinan had employed almost 2000 people by 1904.
Besides being the hardest mineral on earth, diamonds are valued as gems for their remarkable optical characteristics. These are transparent crystals of carbon atoms that are tetrahedrally bonded. They are formed deep below the earth's surface under high temperature and pressure conditions. Because of their brilliance, these gemstones have been highly revered since ancient times. The word "diamond" comes from the Greek word adamas, meaning "unconquerable".
Hardness and Weight: Diamonds are known to be the hardest natural substance on earth, however, CZs, do not hold this property. CZ are more prone to normal wear and tear, and chip and break easily. They have a rating of 8.5 to 9.0 out of 10 on the Mohs' hardness scale. Diamonds have a 10 out of 10 rating. Although, not as hard as a diamond, it weighs 1.75 times more than a diamond of the same size.
Cubic zirconia are man-made gems that closely resemble the properties of diamonds. To a layman, both the gems look quite similar. However, professional gemologists can differentiate between them easily. Let's take a look at the differences between these two gemstones.
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