The appearance of zircon and diamond is very similar, but the price of zircon and diamond is quite different. The specific differences are as follows:
1. Diamond is the hardest substance known, and only diamond can describe diamond. Its Mohs hardness is 10. The Mohs hardness of aragonite is 8; Corundum (red and sapphire) is 9; Therefore, diamonds can carve corundum; Shi Hao cannot carve corundum, and corundum cannot carve diamonds; Corundum can carve zircon.
2. Shi Hao has strong birefringence, that is, it has two kinds of refractive indexes, and the difference between them is very large. This produces a very special optical phenomenon, and the polished zircon product is observed with a magnifying glass.
From the top surface, we can see that the bottom surface and ridge line have obvious ghosts. Zircon can be distinguished from real diamonds because diamonds are "isotropic" and there will never be ghosting.
3. The specific gravity of aragonite is 4.69, while that of diamond is only 3.52, that is, zircon is 1.33 times that of diamond. In other words, two gems with the same volume, the agate is the heavy one and the diamond is the light one. However, the specific gravity is not convenient to observe and can only be known after being measured by instruments.
Extended data:
First, zircon
Zircon belongs to gem grade. So the price is much higher than ordinary crystals and the like. High-type zircon can be further divided into colorless, blue, red, brown, yellow and green zircon.
Zircon is often used as a substitute for diamonds because of its strong luster, high dispersibility and high hardness. Has become a leader in low-grade gems.
The evaluation and selection of zircon are mainly based on color, cleanliness, cutting style and weight. The most popular colors of zircon are colorless and blue, and blue is more valuable.
Second, diamonds.
Diamonds are commonly known as "Jin Gangzuan". That is, we often say that the original diamond is a mineral composed of carbon, which is an allotrope of carbon. Diamonds are the hardest substance in nature.
Diamonds are widely used, such as handicrafts and industrial cutting tools. Graphite can form synthetic diamond at high temperature and high pressure. It is also a precious stone.
Baidu Encyclopedia-Shi Hao
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