Method for identifying opal stones
Identification of cat's eye
In recent years, there has been a glass fiber cat eye ring sale on the market, which is set on a gold or silver ring. The method of identification is that when the ring is turned, the curved tip of the fake cat's eye can have several bands at the same time, and only one of the real cat eyes. The fake cat's eye line is dull, and the real cat's eye line is flexible. The color of the real cat's eye is mostly brown or light green, and the fake cat's eye has various colors, such as red, blue and green.
Gold emerald is the jewel of hardness second only to diamonds and red sapphire. Gold emeralds and variants of the stone and opal, these three gems are not only very beautiful, but also because they are extremely rare, so the price is also very high. After the Caroline cut is applied to the gold emerald containing the developed vacuum-like inclusions inside the gold emerald, the opal is the color change effect.
Calendering is a process of post-treatment of fabrics, which can be rolled once with a professional calender. The gloss of the rolled fabric will be better. Calendering is a kind of fabric processing technology, generally physical effect, through high pressure 80~120 tons, (normally there will be temperature 80~100°c), so that the fabric can achieve anti-velvet (to prevent the down run), smooth and soft And so on.
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