The sapphire is considered the holy stone of the Catholic Church, and many other religions also believed it to represent the heavens. Since 800 BC, Persians believed that the blue sky was the reflection of sapphire stones.
The second-largest sapphire at present is the 423 carats (85 g) Logan sapphire which is kept in the National Museum of Natural History, Washington, DC Historyįor centuries, sapphires have been considered essential and mystical gems. The association may come from the blue sapphire's historical importance within several religions. While sapphire is usually considered blue, it comes in a collection of colours, with blue merely being its most common one. The word sapphire is derived from the Latin word "saphirus" and the Greek word "sapheiros" meaning blue. Sapphire is the name given to all the gemstones found in the Corundum mineral series, apart from the red variety called Rubies.
Corundum mineral is the second hardest mineral on earth, just after diamond.
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