Each month of the year is traditionally associated with a gemstone. For those born in December your birthstone is one of the worlds most ancient gems - Turquoise. This semi-precious gemstone is most known for it's sky blue colour, however it also exists in blue-green and apple green. Turquoise exists in some of the worlds oldest know jewellery, originating from the ancient Egyptians over 4,000BC. In ancient Egypt turquoise was called mefcat which means 'joy' or 'delight'.