Emerald (มรกต)

In Egyptian history, it was believed that emeralds can bring immortality and was buried alongside the Pharaoh. Emerald is categorized in the Beryl or Beryllium group which contains Beryllium Aluminum Silicate. Emerald naturally found in hexagon shape with green color. Its hardness approximately reaches 7.5 to 8 in Moh’s scale. Due to its hardness that […]

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