If the star is too 'perfect' and the color is too blue, it's not genuine.But there are also many fakes that aren't marked at all.

There are synthetics called 'Lindy' or 'Linde' Star Sapphires and are marked with an 'L' on the bottom of the stone, so that's a surefire giveaway that this is a synthetic stone! Millions of these Lindy stones were manufactured in the mid-20th Century. The same Etsy seller who sells huge 'Kunzite' and 'Paraiba Apatite' (what? Paraiba is a tourmaline, not Apatite) for about $100 (and the same glass stone jewelry on ebay for $20) is now also offering fake Star Sapphires. There are a LOT of fake Star Sapphires being produced in China and Thailand right now. Rarely have the combination of a fine translucent or transparent color Six legs should be fairly straight and equally prominent. Least these two things: 1) the intensity and attractiveness of the bodyĬolor, and 2) the strength and sharpness of the star. The value of genuine star sapphires is influenced by at Star Sapphires are almost unknown, and very rare. Is usually found in blue colors, but there are also various shades ofīrown and green that are called Black Star Sapphire.

Parallel needles that intersect one another at 60 degree angles. Tiny needle like rutile (called 'silk') arranged in three sets of This effect, called asterism, is caused by light reflecting off With a single light source:, such as a flashlight or bright sunlight, and the star moves across the stone as the light The star is most visible when illuminated These star sapphires are cut in a smooth domed cabochon But some newer, better quality synthetic Star gems are now on the market-see pictures below! Natural Star gems are irregular and imperfect, and the stars will be 'wavy' and uneven in length and brightness. Synthetics are very inexpensive to produce and are very common! How can you tell the difference? For starters, synthetic stars will be 'perfect', with very little or no irregularities and extremely sharp stars. Genuine Star Corundum (Sapphires and Rubies) are incredibly beautiful and interesting gemstones, and rare and expensive. The Star of India is a 563.35 carat (112.67 g) Star Sapphire

Natural star sapphire