Since the dawn of time, gemstones have fascinated the human race, and this fascination is still present today. Gemstones have been used for jewellery, as well as for weapons. Many gems are believed even to posses other qualities, such as healing powers or provide protection against evil.
A gemstone is the naturally occurring crystalline form of a mineral, which is desirable for its beauty, valuable in its rarity and durable enough to be enjoyed for generations. A gem is truly one of nature's most beautiful creations, perfected with the skills of cutters who turn a plain rock into a beautiful shining stone.
If you would compare two gemstones with the same colour, and weight, you will notice a difference. It will not be noticeable with the naked eye, but the structure will be different, making every single gemstone, a unique masterpiece.
At Gem World, we only work with 100% natural gemstones, with a special care for exclusive "unheated" stones.
There are more than 40 popular gem varieties and many more rare collector gemstones. Although some gemstone varieties have been treasured since before history began and others were only discovered recently, they are all nature's gifts to us.
A sapphire is a typically blue gemstone variety of the mineral corundum, an aluminium oxide. Trace amounts of elements such as iron, titanium, chromium, copper, or magnesium can give corundum respectively blue, yellow, purple, orange, or green colour. Sapphires exist in many colours, however they may also be colourless.
The sapphire is one of the three gem-varieties of corundum, the other two being ruby (defined as corundum in a shade of red) and Padparadscha (a pinkish orange variety).
A ruby is a pink to blood-red coloured gemstone, a variety of the mineral corundum. The red colour is mainly caused by the presence of the element chromium. Its name comes from ruber, Latin for red.
Other varieties of gem-quality corundum are called Sapphires. Rubies are considered one of the four precious stones, together with sapphire, emerald and diamond.
Prices of rubies are primarily determined by colour. The brightest and most valuable red, called blood red or pigeon blood, commands a large premium over other rubies of similar quality. After colour follows clarity: a clear stone will command a premium, but a Ruby without any needle-like rutile inclusions may indicate that the stone has been treated. Cut and carat are also important factors in determining the price.
Emerald is a gemstone and a variety of the mineral Beryl coloured green by trace amounts of chromium and sometimes vanadium. Beryl has a hardness of 7.5–8 on the Mohs scale. Most Emeralds are highly included, so their toughness, resistance to breakage is classified as generally poor.
Emeralds occur in hues ranging from yellow-green to blue-green, with the primary hue necessarily being green. Yellow and blue are the normal secondary hues found in emeralds. Only gems that are medium to dark in tone are considered emerald; light-toned gems are known instead by the species name green Beryl. The finest emeralds are approximately 75% tone on a scale where 0% tone would be colourless and 100% would be opaque black. In addition, a fine stone should be well saturated; the hue of an Emerald should be bright (vivid).