Are Blue Star Sapphires Expensive

The most valued blue sapphires are velvety blue to violetish blue in medium to medium dark tones.

Are blue star sapphires expensive. Tiny needles of silk within the sapphire crystal reflect light and form a star sapphire s telltale star. Blue sapphires usually have some inclusions but generally have better clarity than rubies. Yellow star sapphire ceylon good star si vvs type ii 200 to 2 000 per carat. Color has the greatest influence on a sapphire s value and preferred sapphires have strong to vivid color saturation.

Star sapphires exhibit a special optical phenomenon called asterism. Add 8 to 10 for rounds and pears. Blue star sapphire ceylon good star si vvs type ii 3 000 to 6 000 per carat. The optical phenomenon responsible for the star sapphire s shimmering rays is called asterism from the latin word astrum for star.

Other blue sapphires heat treated material. Sapphires with these qualities command the highest prices per carat. Purple star sapphire ceylon good star si vvs type ii 100 to 1 500 per carat. The price of a sapphire is determined based on its quality which means that a large low quality sapphire would be a lot cheaper than a small but very high quality sapphire.

Add to 20 or deduct to 10 for other cutting. Average brilliancy of 40 to 60. The most common star pattern is a 6 rayed star although star sapphires with 4 rays and 12 rays have been found. A burmese blue cabochon star sapphire and diamond cocktail ring.

The most expensive sapphire was sold on record costing 135 000 per carat. Star sapphire is a type of sapphire displaying an optical star like effect.