Sapphire Beautiful Necklace Jewellery Collection

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  THE IDENTIFICATIONS OF SAPPHIRE

By Aamir Mannan.

As in the case of ruby, the most effective substitute for natural sapphire is it synthetic counterpart, and the method for detecting the difference between the natural and the manufactured stone will be found bellow, although the whole subject of synthetics has already been dealt with in chapter 7.

The cobalt-blue forms of synthetic spinal must also be considered as a sapphire substitute, since this is their raison D'etre.

Glass imitations of sapphire are not often seen, since the synthetics stones are clearly more effective as a substitute.

The old-fashioned garnet-topped doublet on a blue glass base is also seldom seen, but a much more effective type of doublet has been exploited in recent year, in which a crown of natural australian sapphire cemented to a base of synthetic blue sapphire; fuller reference to this type of doublet will be found at the end of this chapter.

As for natural blue gemstones, blue spinal and blue tourmaline are not uncommon, and exceptions specimens of these minerals may be mistaken of supphire, though the blue of spinal is a greyish blue, indicolite tourmaline is commonly a deep greenish indigo-blue  in colour.☺