Tanzanite and sapphire are two similar gems. They are very similar in many respects. Many people can't distinguish between them if they don't pay attention to it. With the heat of tanzanite in recent years, more and more friends like it. It, then, the small series of China Jewelry Merchants Network will take you to understand the difference between tanzanite and sapphire.
Sapphire and tanzanite
Sapphire belongs to corundum. Because of the difference in internal trace elements, the biggest feature of sapphire is that the color is not uniform, the dichroism is strong, and the dichroism of blue and green can be observed. Sapphire appears to be lighter in bright light, but darker in normal daylight.
In fact, when it comes to tanzanite, everyone is most familiar with the heart of the ocean in the movie Titanic. Tanzanite was discovered in 1967 in Tanzania, Africa. It is produced at the foot of Kilimanjaro, a world-famous tourist spot near Arusha in the northern city of Tanzania. This is the only place in the world where tanzanite is produced.
Many people don't know that most of the untreated tanzanites are brownish yellow and become blue-violet or purple-blue after heat treatment. Therefore, in the market, the heat treatment of tanzanite is very common. However, this is generally accepted in the industry and does not affect the price of tanzanite.
The common color of tanzanite is blue, purple blue or blue-violet, and only the top-grade tanzanite has a deep blue effect. The general tanzan blue is dark purple, showing less color change, and the tanzanite with poor quality is lavender, and there is no obvious dichroism from different angles, only the change of color depth.
The difference between sapphire and tanzanite
1, look at the color
Most of the tanzanite is a little purple, which is characteristic of most sapphires, so you can first observe whether the gems have purple tones.
Tanzanite is more colorful than sapphire. Because most sapphire colors are gray or black, and tanzanite is more blue. Sapphire is generally not as bright as tanzanite. Except for cornflower sapphires, most sapphires have a 'dark domain'. This can be a simple way to distinguish between the two.
2, see the hardness
The sapphire has a Mohs hardness of 9, second only to diamonds. For finished products, it can be used to score the standard hardness of topaz and crystal to determine the hardness. The hardness of tanzanite is 6.5-7, according to the hardness standard. It is almost certain whether it is a sapphire. But be careful when scoring, don't destroy the gem.
The hardness of tanzanite is naturally insufficient, and it can only be called semi-precious stones. It is easy to produce scratches, the color is easy to change color, and temperature radiation has an effect. So tanzanite is not suitable for a ring, so it is easy to hurt it.
In fact, when sapphire and tanzanite are put together, you will find that sapphire appears hard and tanzanite appears soft. Although some people will question how hard and soft can be seen through the eyes, in fact, as long as you carefully observe and see more gems, you will naturally see different textures of various gems.
3, see the clarity
Relatively speaking, the texture of tanzanite is relatively pure and clear, while the impurities of sapphire are slightly more. But this method is only for reference and does not apply to top sapphire.
4, look at the size
Tanzanite and sapphire have a big difference. Tanzanite has a lot of gemstones. Compared with sapphire, tanzanite is quite large.
The meaning is that the 2-3 carat sapphire is relatively large, and the high quality sapphire is rare on 5 carats, while the ten carats of tanzanite are very common. So when you see a stone with a large head and a suspected sapphire, consider the possibility that it is tanzanite.
5, see the price
When picking sapphire and tanzanite, some clues can be seen through the price. Sapphire is very expensive, and the price of tanzanite is relatively low, so you can easily judge it through this. But if the merchant is bent on taking Tanzanite instead of Sapphire, then there may be problems from the price judgment. So this can only be used as a basis.
However, we still have a lot of situations in the actual selection. We need to go to the market to see more, learn more, and use our own heart to experience it, so that we can train a pair of eyes. If it is still difficult to distinguish, then ask the merchant to obtain the certificate issued by the formal institution.
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