Star Sapphires display an incredibly beautiful six (or twelve) rays star. The stars are caused by the light reflecting from small needle-like rutile inclusions aligned perpendicularly to the rays of the star. This unique optical phenomenon is called asterism. Star Sapphires are available in a plethora of colors and highly desired for its uniqueness, beauty, rarity and durability.
Star Sapphire Quality & Price
The quality and value of any stone is evaluated on certain parameters.
Origin -Naturally occurring Star Sapphires are very rare and are predominantly found in Sri Lanka. Star Sapphires have also been found in Burma, Cambodia and India but Sapphires from the Ceylon Sri Lankan region display a well-defined star effect.
Colour -Star Sapphire is found in various shades of blue, grey, pink, purple, brown, green, yellow and orange in nature. Blue Star Sapphires are the most common while orange and yellow are very uncommon. Colour Changing Star Sapphires also exist but are exceptionally rare. The value of Star Sapphires is affected by the intensity and attractiveness of the body colour along with the strength and sharpness of the star.
Clarity -Star Sapphires have needle-like inclusions that cause the star phenomenon in them. An ideal Star Sapphire would have enough rutile for a well-defined star without compromising the stone’s transparency but Star sapphires rarely have the combination of a fine translucent or transparent color and a sharply defined star.
Cut -Star Sapphires are cut in smooth domed cabochon shape to bring out the star effect. Cuts which have a bright properly oriented star are highly rare and valuable.