Emerald Smalls
Rubies and sapphires are composed of almost pure aluminum and oxygen and are members of the corundum family. The mineral is often called a ruby when it is red and a sapphire when it is blue. Ruby and sapphire should be transparent or nearly so, to be considered of gem quality. Few are in this way, the natural state. Rubies and sapphires that are suitable for use gem, like diamonds, are used for mechanical purposes because of their hardness. Both gemstones have a hardness of 9, and a specific gravity of 3.9 to 4.1, only diamond being harder. The best gem quality stones are not used for bearings in machinery end. They are also used as watches and jewelry some electrical supplies.
The color of rubies comes from a small amount of chromium oxide. The color in rubies and sapphires are rarely in all. Often this defect can be remedied with the proper application of heat. One of the most rubies and which are just as brilliant as they are in natural light to artificial light. Major flaw less and transparent rubies are extremely rare and often in large are more precious than diamonds. Ruby is the world's largest Raviratna, and weighs 3600 carats. Both gems were considered as protection against poisoning in earlier times.
Rubies and sapphires are found in Burmah, Siam, Ceylon, Afghanistan, Tibet, Australia, North Carolina, and the United States. The best rubies are found in Burmah. Rubies mined in Upper Burmah have been extracted from the fifteenth century. Rubies are usually found in mines, hillsides, clay, valleys and rivers. Ruby color is often a part of the world that are coming. Rubies as in all shades of red, black, blue and purple. Also much heat can destroy a ruby color entirely sufficient, but it can improve color. It 'very difficult to say whether these gems have been heat treated.
The emerald is a green beryl. An emerald is perfect rarer than any other stone. Some believe that the emerald, takes its color from small amounts of matter organic in them. Many scientists believe that the color is due to an oxide of chromium. The emerald is subject to many structural deficiencies, defects, muddiness, and changes color. Usually, the better the color, the worse it is. Impeccable ore fine color is almost unknown. The emerald is composed of silica, an oxide of silicon. The rest of the mineral is composed of equal parts of alumina and articles thereof.
Emeralds have been discovered in a few places around the world. Emeralds have discovered in large quantities in Peru. Many emeralds Perus, along with many of its precious metals were stolen by marauding Spaniards. It is believed that a ship of pirates returned in Spain in 1587, with two boxes, each of which had a hundred weight of emeralds. Emeralds have been discovered in Africa, Egypt, Colombia, Austria, and some have also been found in North Carolina and Connecticut.
The emerald is considered to bring luck and prosperity. One of the largest in the world is the Mogul Emerald, which dates back to 1695 and weighs 217.80 carats.
Description
Rubies and sapphires are composed of almost pure aluminum and oxygen and are members of the corundum family. The mineral is often called a ruby when it is red and a sapphire when it is blue.
One short day in the Emerald city – Choreographer Blaž Godec,Riesa 2008
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