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September Birthstone - Sapphire

Blue sapphire belongs to the mineral species corundum.  It can be a pure blue but ranges from greenish blue to violetish blue.  The name "sapphire" can also apply to any corundum that's not red and doesn't qualify as ruby, another corundum variety.

Besides blue sapphire and ruby, the corundum family also includes so-called "fancy sapphires."  They come in violet, green, yellow, orange, pink, purple, and intermediate hues.  There are also "parti-colored" sapphires that show combinations of different colors.  Some stones exhibit the phenomenon known as color change, most often going from blue in daylight or fluorescent lighting to purple under incandescent light.  Sapphires can even be gray, black or brown.

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.  In its purest state, corundum is actually colorless.  Colorless sapphires were once popular diamond imitations, and they've staged a comeback as accent stones in recent years.

But colorless corundum is rare.  Most corundum contains color-causing trace elements.  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.  Chromium can cause the red color of ruby or the pink of pink sapphire.

Traditionally, sapphire symbolizes nobility, truth, sincerity, and faithfulness.  It has decorated the robes of royalty and clergy members for centuries.  Its extraordinary color is the standard against which other blue gems --- from topaz to tanzanite --- are measured.

For centuries, sapphire has been associated with royalty and romance.  The association was reinforced in 1981, when Britain's Prince Charles gave a blue sapphire engagement ring to Lady Diana Spencer.  Until her death in 1997, Princess Di, as she was known, charmed and captivated the world.  Her sapphire ring helped link modern events with history and fairy tales.

In ancient Greece and Rome, kings and queens were convinced that blue sapphires protected their owners from envy and harm.  During the Middle Ages, the clergy wore blue sapphires to symbolize Heaven, and ordinary folks thought the gem attracted heavenly blessings.  In other times and places, people instilled sapphires with the power to guard chastity, make peace between enemies, influence spirits, and reveal the secrets of oracles.

In folklore, history, art, and consumer awareness, sapphire has always been associated with the color blue.  Its name comes from the Greek word sappheiros, which probably referred to lapis lazuli.  Most jewelry customers think all sapphires are blue, and when gem and jewelry professionals use the word "sapphire" alone, they normally mean "blue sapphire."

Information sourced from GIA at <>

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