| Iolite Gemstone Information Information * Loose gemstones * Jewelry links Iolite is the gemstone representing the 21st wedding anniversary. The name is derived from the Greek word ios, meaning "violet." Iolite is known as the gemstone of clear vision. It was believed to have the power to guide lost sailors to the brilliance of the sun in order to find their way home. |
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ENHANCEMENT CODE N Click to view AGTA code. PROPERTIES Refractive Index 1.542-1.551 Hardness = 7-7.5 (Moh's Scale) Specific Gravity = 2.61 Species - Iolite Optic Character - Double Refraction. Phenomena - Rare WARNINGS FOR CARE Ultrasonic: Risky Steamer: Risky Heat: Fusible Chemicals that harm: Acids |
Crystal Structure  Crystal system: Orthorhombic short prisms. MAJOR SOURCES India, Tanzania, Brazil, Sri Lanka, Madagascar, Namibia, Myanmar |
Birthstones | |
| January | Garnet | ||
| February | Amethyst | ||
| March | Aquamarine | ||
| April | Diamond | ||
| May | Emerald | ||
| June | Pearl/Alexandrite | ||
| July | Ruby | ||
| August | Peridot | ||
| September | Sapphire | ||
| October | Opal/Tourmaline | ||
| November | Topaz or Citrine | ||
| December | Blue Topaz or Zircon | ||
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