ҮНЭТ ЭРДЭНИЙН ЧУЛУУ | Natural history museum of Mongolia
The origin of the name Indraanil is unknown, it is derived from the Latin version of the Greek word sapphirus, a similar word found in Persian and Old Hebrew. Blue corundum has long been called sapphire. This gemstone is made of alumina (Al 2 O 3) is a grade 1 gemstone. Available in translucent, blue-pink to indigo-blue.
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