These valuable gems are called star sapphires. Some rare sapphires have a mineral called rutile within them that produces what looks like a six-pointed star. Rosery Poetry blue star sapphire September birthstone ring $49.90, SHOP NOW. Like any other colored gems, they are judged mostly on their color. Since almost all sapphires have inclusions, they are not judged on their clarity as strictly as a diamond would be. It has a refractive index of 1.76 to 1.77 and is 3.9 to 4.1 times denser than water.

The chemical formula for sapphire is Al2O2, or aluminum oxide, minus any impurities.

It makes cutting and polishing a sapphire very challenging. This means that the stone presents different colors when seen at different angles. Sapphire is transparent to translucent, with a vitreous and or glassy luster, and has a strong pleochroism. It has a value of 9 on the Mohs hardness scale. Sapphire is made of corundum, which is the hardest natural substance after diamonds, and the extremely rare gem: moissanite. Sapphire properties: Hard, can be any color but red, inevitable inclusions Sapphire is a very hard gemstone And the folk believed that the gemstone could suppress wicked thoughts. Medieval clergymen wore sapphire stones because their blue color was a symbol of heaven. The kings of ancient Persia believed that the sky’s color was but a reflection of the blue sapphire. It has been worn as a talisman against illness and it is said to be able to safeguard travelers. The word sapphire comes from the Greek sappheiros, which refers to the rich blue color that most people associate with sapphire. A long history of the sapphire September birthstone This article discusses the beauty and value of sapphire, its history, physical properties, meanings, mining countries, famous pieces of sapphire jewelry, and how sapphire jewelry should be cared for. Sapphire is well known for its unique blue color and it is the stone of wisdom, symbolizing love and purity. The September birthstone is sapphire, a rare and valuable gemstone that has been prized since ancient times.

September sapphire birthstone