Aquamarine and topaz are silicate-like crystals in mineralogy, and their crystal characteristics and physical characteristics are basically the same. The difference is that the genesis and formation conditions are different, so that the colored ions contained therein are different and exhibit different colors. The color of the gem is different. So, what are the differences between Aquamarine and Topaz? You will understand the contents of today's jewelry class.
colour
Topaz is generally yellowish brown - brownish yellow, light blue - blue, red - pink and colorless, very few in green tones. It must be pointed out that the color of some topazes currently on the market is the result of irradiation treatment and heat treatment.
Some blue topaz on the market is made of natural colorless topaz which is browned by radiation and then heat treated to give a blue color. Brazilian pink and red topaz is the heat treated yellow and orange topaz of the property.
Most of the aquamarine is light blue with a slight greenish tint, and the color is like the shallow sea of ​​the resort, fresh and pleasant. The color is sky blue to sea blue or green blue, which is best for bright and clean, bright blue to light blue.
feature
Aquamarine is characterized by sky blue, sea blue, glass luster, less inclusions, clean, transparent, weak dichroism, hexagonal columnar crystal form. Topaz belongs to the orthorhombic system, transparent to opaque, with obvious trichromaticity, columnar crystal form, cylindrical surface often with longitudinal stripes, and the topaz from the sand mine is mostly abraded into an elliptical shape.
Inclusion
Most of the natural aquamarine has a crack. Most natural aquamarines have a lighter blue color, while topaz is relatively less polluted and has more than one color.
hardness
The hardness of aquamarine is greater than the hardness of topaz. Its texture is brittle, and it is afraid of high temperature. At high temperatures, aquamarine is easy to burst, and it will fade when it is baked.
price
If the color is deep and the price is not expensive, it is basically impossible to be aquamarine. Most of the current aquamarine colors are light, almost colorless, and the price of quality is very high, which can reach 10 times that of topaz.
density
The best method for identifying aquamarine and topaz is density. Topaz sinks in heavy liquid of diiodomethane (density 3.32 g/cc), while aquamarine floats on diiodomethane. In addition, certain topaz inclusions can be distinguished, but need to be identified by microscopy.
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