There are not many world sapphire producing areas, mainly Myanmar, Sri Lanka, Thailand, Australia, China, etc., but in terms of gem quality, Myanmar and Sri Lanka have the best quality. According to different geological origins, it can be divided into: sapphire produced in Myanmar, Sri Lanka, India Kashmir and sapphire produced in Australia, Thailand and China.
It can be seen that the flat ribbons and the growth lines are arranged in parallel with the hexagonal cylinders. Polycrystalline twin crystal development, common blinds double crystal grain. The cracking is split along the double crystal plane. Strong dichroism. In addition to the above common features, sapphire from different regions of the world is also characterized by different origins.
The sapphire of Myanmar and other real estates, due to the coloration of titanium, is bright blue, containing silky rutile and fingerprint-like liquid inclusions. The silky rutile inclusions can produce six or twelve starlights and are of high quality gemstones.
The sapphire produced in Australia, Thailand and China contains more iron and is colored by iron. Therefore, the color of the gemstone is very dark, and the reflection effect of the faceted gemstone is not very good. Generally, it needs to be heated and processed to be used.
Indian Kashmir sapphire, blue cornflower, is a micro-purple purple indigo, bright color, is a high quality sapphire. However, because mining is difficult, it is relatively rare in the market.
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