Sapphire evaluation and purchase:
Sapphire evaluation and purchase factors are color, weight, transparency and clarity
The biggest feature of sapphire is that the color is not uniform, the polycrystalline twin crystal is not developed, and the dichroism is strong. The sapphire produced in Myanmar is bright blue (including titanium coloration), which can produce six or twelve stars due to inclusions.
Indian Kashmir sapphire, blue cornflower, is a micro-purple purple indigo, bright color, is a high quality sapphire. Sapphire produced in Sri Lanka, Thailand, China and Australia also has its own characteristics. Sapphire is brittle and should be worn and bumped when worn.
The biggest feature of sapphire is that the color is uneven, and the flat ribbons and growth lines with different depths can be seen in parallel hexagonal cylinders. Polycrystalline twin crystal development, common blinds double crystal grain. The cracking is split along the double crystal plane.
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