Raymond Weil Replica watches is best described

Raymond Weil Replica watches Historically gemstones were classified into two categories, precious stones and semi-precious stones, in this article we will talk about traditional precious stones. There are four stones that are classed as precious they are diamond, ruby, sapphire and emerald, all other gemstones are classed as semi-precious.Apart from diamond, ruby, sapphire and emerald, amethyst was considered to be a precious gem until the discoveries of bulk amethyst in Brazil in the 19th century. Also pearl can be classed as a precious gem but (strictly speaking it is not a gemstone).Today many gemstones are used in the most expensive jewelry depending on the designer and fashion trends and availability of gemstones, never the less diamonds, rubies, sapphire and emeralds still have a reputation that exceeds all the other gemstones.Diamonds are the hardest natural substance known to man, they were first discovered about 6,ooo years ago and were all ways considered to be a precious gemstone, the popularity of diamonds has risen since the 19th century because of increased supply, improved cutting and polishing techniques, and this combined with its exceptional luster and brilliant fire, has made it the most highly prized of all gems.Rubies the name given to red, gem quality (corundum), is one of the best gemstones for Raymond Weil Replica watches settings. Rubies may be in any shade of red, from pinkish to purplish or brown red but the finest ruby is best described as the colour of pigeon blood. All natural rubies have imperfections in them, including color impurities and inclusions to a trained eye the presence of these imperfections distinguish a genuine ruby from synthetics. All most all rubies are treated in some form, heat treatment is the most common practice, however rubies that are of excellent quality and are untreated command a large premium.Sapphire, all gem quality (corundum) that is not red is called sapphire, this name is associated with the color blue and is highly prized as a gemstone. Normally ranges from very pale blue to a deep indigo but the most valuable is a clear, deep blue, some stones called Raymond Weil Replica watches