Knowing All About Sapphires, Rubies and Emeralds Jewelry Sapphires, rubies and emeralds are considered the most desirable precious gemstones, which are used in fine jewelry, and are often chosen as an engagement ring jewelry. Provided are the background information of sapphires, rubies and emeralds. Sapphires are Corundum minerals, which are basically composed of aluminum oxide compounds in crystalline form, and which comes in a variety of gemstone colors, such as blue, which is a common choice color, pink, yellow, green, purple. For sapphire stones, which are in a red form, they are no longer called sapphires, but rubies. A jeweler’s standard guidelines, the 4 C’s – cut, clarity, color and carat, is the yardstick in assessing a gemstone’s value and quality, such that for sapphires, in which they are rarer than diamonds, their clarity of the stone, color and carat value will depend on the source location of where the sapphire stone was mined, with blue and pink as high valued gemstones, while their cut will depend on the jeweler’s creative design.
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After diamonds, sapphires are among the hardest gemstones, with a Corundum composition structure that measures a scale of 9 on a Moh’s hardness scale, which tells that sapphires have stable durability and which can be used as a gemstone ring.
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Sapphire gemstones have been historically associated with royalty and symbolize sincerity and faithfulness, such that King Solomon’s seal was believed to be made from sapphire, Prince William of England proposed to Kate Middleton with his mother’s iconic sapphire engagement ring, and 45th wedding anniversaries use sapphire as its symbolic ring celebration. Rubies have the same Corundum composition, like that of sapphires, but with the exception that it comes in a red form, which is due to the presence of chromium, being an impurity in the stone, but considered a rarity, making rubies as valuable gemstones. The value of rubies is that they are extremely rare gemstones, in fact much rarer than diamonds, and that’s why they are classified as highly valued gemstones, especially those mined from Burma. Attaining a scale of 9 in the Moh’s hardness scale, rubies, just like sapphires, are among the hardest gemstones. Emeralds come from a mineral called beryl, which is also the same mineral component in such gemstones as aquamarine, helidor, and morganite. The grass green emerald color in emeralds is due to the presence of chromium, which is actually an impurity in the composition structure of the stone, but which makes the emeralds as very rare and highly valuable gemstones, just like rubies. Because they are hard to find in gemstone mines, emeralds are rarer than diamonds and the range of their degree of value is dependent on the range of their green coloring, such that the intense grass green color is most desirable and, therefore, highly valuable compared to the pale green color. In the Moh’s scale, the hardness of emeralds is 8, which means that these stones are reasonably durable, and, therefore, vulnerable to heat damage and extreme changes in temperature, which can cause them to break.