As an easily recognizable optical effect, the cat's eye effect has become a very popular gemstone term, but most of the friends see that the gem has an obvious eyeliner and call it an opal. It is not known that the "cat's eye" is gold green. The unique name of the gem cat's eye, and there are many kinds of gemstones with cat's eye effect. How much have you seen?
A gemstone with a cat's eye effect is more than a kind of pumice
We know that sapphire has many different colors, blue is called blue sapphire, and purple is called purple sapphire. For the same reason, we only need to add the name of the gem in front of the cat's eyes. For example, the tourmaline with the cat's eye effect is called the tourmaline cat's eye, and the cat's eye with the cat's eye effect is called the cat's eye cat's eye. However, there is a special case, that is, a gold emerald with a cat's eye effect, which can be directly called opal, which can be remembered.
Causes of cat eye effect
The cat's eye effect is generally produced by the parallel alignment of the acicular mineral inclusions inside the gemstone.
The most common gemstones with cat eye effects are the following
1 opal (cat's eye gold emerald)
Gold Emerald ranks among the top five gems in the world, and the degree of luxury is evident. It belongs to the spinel family of minerals, the colors are different, mostly yellow-green, such as honey yellow, brown yellow, wine yellow, brown yellow, yellow green, yellow brown, gray green, etc., among which honey yellow is the most expensive.
Transparent to translucent, glass to grease luster. Only the gold emerald cat's eye can be called opal alone. Of course, when we talk about "cat's eye", we all know that this refers to the gold emerald cat's eye.
2 Alexander Opal (transfigured cat's eye)
It can directly become a variable stone in the Alexandrian stone, gold green opal, that is, in addition to the cat's eye effect of the general opal, it also has a stone effect.
The reason for the discoloration of Alexandria is due to the selective absorption of light by some gold emeralds, so that the green wavelength of the daylight is stronger, the gems are green, the red wavelength at night is stronger, and the gems are under candlelight. It is red. The output of the stone has been extremely rare, the most important sources being Brazil and Sri Lanka.
3 red, green tourmaline cat eyes
The cat's eye effect in the tourmaline is the tourmaline cat's eye, which is mostly red and green tourmaline. The cat's eye effect of tourmaline is because the inside of the tourmaline has a parallel tubular inclusion. The body reaches a certain density. In the direction perpendicular to the parallel inclusion, there will be a bright line under the illumination of the point source. Grinding out will have a cat's eye effect.
4 emerald cat eyes
The Emerald King's emerald also has a part of the cat's eye effect. This emerald cat's eye is very rare. Like the rare six-line star emerald, it is mostly produced in Brazil and Africa.
5 矽 line stone cat eyes
The scorpion cat's eye is a cat's eye gemstone that is more common in gemstones with cat's eye effect. The sillimanite itself is a glassy silicate mineral, and inclusions such as rutile, spinel, and biotite are visible inside.
A striated stone with a cat's eye effect, a set of fibrous inclusions or fibrous aggregates arranged in parallel is visible to the naked eye. Sri Lanka's scorpion cat's eye is caused by the arrangement of fibrous perilla pyroxene and some rutile needles.
6 apatite cat eyes
Apatite is a phosphate mineral. After the cat's eye effect, it is often confused with the cat's eye, and it is also more common with the cat's eye, but it can be distinguished from the transparency. The cat's eye is better in transparency, while the apatite cat's eye is generally translucent or even opaque.
7 stubborn pyroxene cat eyes
The pyrophoric pyroxene is a kind of iron-magnesium silicate solid solution series with less iron content, because the iron content is less and the color is brighter. The stubborn pyroxene cat's eyes are generally brown, purple, green, etc., translucent, mostly produced in Myanmar and South Africa's Azania.
8 square pillar cat eyes
Quercus is a common silicate mineral, but the gem grade is relatively rare. Most of the cat's eye is pink, orange or yellow. Most of them are mixed with feldspar, but the cat's eye effect of the stellite is obvious. Can be distinguished.
Other gemstones with cat's eye effect include: red sapphire cat's eye, aquamarine cat's eye, columnar cat's eye, moonstone cat's eye, wood stone cat's eye, actress cat's eye, opal cat's eye, spinel cat's eye, cordierite cat's eye, Garnet cat eyes, tremolite cat eyes, peridot cat eyes, tanzanite cat eyes, serpentine cat eyes, malachite cat eyes and worthless glass cat eyes.
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