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Properties of ruby gemstones

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Properties of the gemstones come under the two categories-Gemological properties and physical properties. Gemological properties include the Gemological Information about the gemstones.   It includes the Information such as, Chemical used for the gems are Beryllium Aluminium  Silicate. Hexagonal is the crystal system and the Prismatic is the Crystal habitat used for the Ruby Gemstones . The Hardness varies from 7.5 to 8.0. The Refractive Index varies from 1.57-1.58.  As a Gemologist, One can handle gemstones everyday. By using some basic gemological Technics  one can identify the gems by looking at it. But Actual  Identification of the gems depends on their Physical properties.      Following are the Physical properties:          Weight and Specific Gravity: It  relates to the heaviness and the size of the gemstones. When the Gem is Weighed in Air and then in Water, the loss of weight is equal to the...