Dahl Jewelers, Woodbridge, VA
Blue Sapphire, Blue Sapphires
Few gems can compare to a sapphire. Throughout history, sapphire has been noted as a regal gem. Kings and queens have worn them, not only for decoration but also as a talisman offering a powerful defense against harm.
In Europe during the twelfth century, the Bishop of Rennes, France lavished praise on the sapphire for important uses such as ecclesiastical rings. It has been said that nature endowed it with so great a power that it might be called sacred and the gem of gems.
In 1495, Bartolomaes Anglicus credited the sapphire as being an antidote against poison. The gem also was believed endowed with the power to influence spirits.
Sir Richard Burton, the famous explorer and translator of the book, 1001 Arabian Nights, possessed a large sapphire which he carried with him on many of his travels. He often called it his talisman, for wherever he went, it assured him of good horses and prompt attention. In the Orient, most believed that such a stone brought good fortune just by gazing upon it. In fact, the stone was so revered that, if Burton did not receive good service, he would refuse to show his sapphire.
Sapphire is a gemstone variety of corundum. Any color of corundum except red is called sapphire and there are many sapphire colors. The name
"sapphire" alone refers to blue sapphire. All other colors have the color name added to the stone, i.e.
"pink sapphire." Sapphire's sister stone, ruby, is the red variety of corundum.
Description of Blue Sapphire Qualities That We Sell
High quality: Very bright royal blue and very lively or deep Ceylon blue. Very well cut, clean and transparent. Ceylon not always available.
Medium quality: Darker blue than high quality with some slightly more grey overtones, but still very lively. Good cutting.
Low quality: Dark blue (not black) that is translucent but somewhat murky looking or a medium light blue/grey look and included.
Very low: Almost black in color, opaque and poorly cut. Can sometimes be lighter blue/grey. In color that will be shallow and poorly cut.
Please check here for a note about colored gemstone qualities.
Blue Sapphire Properties
Toughness: Very good
Specific gravity: 4.00 (+/- .03)
Refractive index: 1.76 to 1.77
Double refraction: -0.008
Main Sources: Thailand, Australia, Sri-Lanka, Africa
Treatment: Heat and/or irradiation to enhance color (stable).
Reaction to heat: Good, but possible color change.
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