There is little doubt that diamonds are amongst the most attractive naturally occurring stones that the world has ever discovered. When the first ones were uncovered in some far flung corner of the world the reaction of these pioneers was unprecedented and led to the utilisation of these wonderful stones as we know them today. Although we mainly associate these gems with jewellery the vast majority of them are not considered to be of sufficient quality to be used as a centre piece for diamond rings and other pieces of jewellery. Diamonds are the hardest substance on earth which makes them ideal for a number of industrial uses and are particularly useful in the manufacture of quality cutting tools and equipment. Regarding the jewellery industry, the most popular choices are colourless but as most have a light tint of yellow or perhaps brown many people actually request yellow stones, these yellow stones are commonly available and have become increasingly popular in modern times. The rise in popularity of this type of gem is probably down to the rareness and the expense of perfectly clear stones without a hint of colour. Very occasionally diamonds are found which are red, blue or green or appearance, these are very expensive rarities and usually find their way to an ultra rich person's personal collection or become a show piece at world renowned precious stone showcases and exhibitions. It is estimated that only 20% of mined diamonds are used in rings and other jewellery.
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