Sapphire: the blue gem sacred to saturn

Do you know the history of the sapphire? Sapphire is a precious stone belonging to the corundum family, it is composed of highly allochromatic aluminum oxide (Al2O3) crystals. As for its hardness, it is one of the hardest gems, in fact it has 9 on the Mohs scale. Its name derives from the Latin “sappheiros”,…

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Tanzanite jewelry, the rarest blue gem

Have you ever heard of tanzanite? Tanzanite is a relatively recent stone. It is called the gem of the twentieth century, because it was only discovered in 1967. It is a very rare stone, much more than diamonds, because there is only one deposit in the world, located on the slopes of Kilimanjaro, in Tanzania.…

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