Zizi Classic Jewelry Cradled Natural Blue Sapphire Ring 925 Silver Fashion Design Trend Blue sapphire belongs to the mineral species corundum. It can be a pure blue but ranges from greenish blue to violetish blue. The mineral corundum is composed only of aluminum and oxygen, and it requires a growth environment that's free of silicon. However, silicon is a very common element, making natural corundum relatively uncommon. When the trace elements are iron and titanium, the corundum is blue sapphire. Only a few hundredths of a percent of iron and titanium can cause the color, and the more iron the corundum contains, the darker the blue. Blue sapphire come from a variety of exotic sources including Madagascar, Tanzania, Sri Lanka, Myanmar, and Australia. Sapphires are rated a 9 on the Mohs scale which is quite durable to many daily activities. FUN FACTS • Intensely saturated and velvety, rare sapphires from Kashmir set the standard for blue. • The world's most famous engagement ring: Kate Middleton's and Princess Diana's sapphire was 18 carats. BIRTHSTONES & ANNIVERSARIES Sapphire is the birthstone for September and the gem of the 5th and 45th anniversaries.
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