How much is topaz?

Topaz is a kind of precious gemstone, gem-grade topaz is extremely rare, the main ingredient is silicon dioxide, in addition, it is also accompanied by some chromium, manganese, copper, iron and other ions resulting in refraction to produce a variety of colors. It is often used for processing crystal ornamental stone, crystal carving, crystal jewelry, crystal ball and so on. Let's take a look at how much topaz costs!

How much is topaz?

Topaz is a relatively high-grade variety of all crystals, with more producing areas, among which the orange topaz produced in Brazil has a bright color and rich crystal quality, which is highly sought after by topaz lovers all over the world. at present, most of the topaz on the market are formed after high temperature heating of white crystals. The price of topaz is divided into different grades, and the price of nearly topaz will be about a few dozen yuan. Cotton split, the lighter color topaz is generally 10 yuan per gram, and the slightly better topaz price will be about 20 yuan per gram. And the price of that kind of thick, crystal transparent, cotton split less topaz will be in a few hundred yuan per gram.

Price factor of topaz

1. Color: topaz takes orange as the top grade, which is regarded as the most valuable by people. Because of its rich and mellow color, it gives people a sense of royal dignity, as long as it is transparent and smooth.

2, cleanness: topaz crystal clear, cracked ice or less cotton can be regarded as high-quality topaz, if the clarity is not high or the color with gray, tea tones, the price will be reduced.

3, luster: the color of amethyst made of heated and faded topaz is lighter and has no sense of beauty, and the tone appears to be a little thin. although it is all quartz, the value of this kind of topaz is not as high as that of natural topaz.

4. Sculptor: natural topaz is hard, lubricated and dignified, so it takes a lot of work to carve. Generally speaking, the topaz made by skilled craftsmen has a higher collection value, and the thinner the topaz is, the more difficult it is to carve it.

5, workmanship: the processing process of topaz products is divided into grinders and sculptors, such as crystal necklaces, bracelets, earrings, etc. belong to abrasives, audio images, internal painting snuff bottles, etc., belong to carvings, a well-made crystal products should be refined, not only can fully show the external beauty of crystal products, but also can maximize its inner beauty.

Identification of true and false topaz

1, look at the fracture: the glass fracture pattern is smooth and curved as a dent in the shell, while the fracture of the crystal can see the stone texture, and the cross section will not appear traces like glass.

2. Thermal conductivity: adjust the thermal conductivity meter to green 4 squares to test gems, natural crystals can rise to yellow 2 squares, when the area is large, rise to yellow 1 squares, but false crystals do not rise.

3, temperature measurement: Crystal is crystal, heat transfer is fast, glass is amorphous, heat transfer is slow. So holding the crystal in your hand will feel cold in your heart, and after wearing it for a short time, it will be synchronized with your body temperature, while the glass will feel warm.

4. test hardness: the hardness of natural crystal is 7, while that of glass is only 5, so as long as the hardness is greater than 5, you can scratch the glass.

5. Price comparison: goods for every penny, even natural crystals are divided into several grades, and the price is very different. There are not many natural topaz of good quality, so don't expect to buy 3A topaz cheaply. The better the crystal is, the more expensive it is.

6, birefringence: put the crystal on a hair, gently turn the crystal, when turning to a certain direction, there is a double shadow, that is, one hair becomes two, the effect is clear and obvious. this is a birefringence phenomenon caused by the arrangement of natural crystals. Pseudocrystals can't do it. The more obvious the double shadow effect is, the better the crystal quality is, and some natural crystals with too many impurities may not double fold obviously, or there may be some phenomena such as hair distortion, straight line breaking and so on, so the quality of the crystal is worse.

7. Optical properties: glass is a non-crystalline homogeneous body, crystal is a crystalline heterogeneous body, the natural crystal that rotates 360 degrees under the polarizer seems to be bright and dark, and the false crystal does not change. In addition, some natural crystals such as amethyst have dichroism, while pseudocrystals do not.

8. Inclusions: most synthetic crystals are pure inside, so large that they look perfect. And natural crystals are generally more or less with some "cotton", cracks and other "flaws". Natural products are not pure, but very rare, rare, reflected in the price, the same piece of color clarity of topaz, natural products are much larger than synthetic crystals.