High-quality grape stone will produce a kind of "fluorescence" similar to the glass type of jade, very beautiful, the color of the grape stone is dark green - green gray green - green green - yellow green yellow green - yellow colorless, etc., occasionally gray. However, in general, the green-tone grape stone must have a yellow or gray color, and the yellow-tone grape stone is usually brighter but not brighter with a gray tone. In general, the color is not pure enough. The good grape stones are usually aggregates, dark green. However, in general, this material has few single crystal facets due to the cleavage and development of single crystals, which is relatively rare. Most of the common grape stones in the market are colorless grape stones produced in Hebei. And most of them are aggregates, which are very similar to colorless jade after processing. Therefore, some merchants will regard high-quality grape stone as a substitute for high-quality jade, please pay attention to the difference. The grape stone is clean inside, the color is pleasing to the eye, the particles are large and round and full and the price is the standard. In the past one or two years, Grapevine has been deeply loved by many designers in the world, especially in Taiwan. The main reason is that in many natural gemstones with similar appearance of jade, the most favorable conditions for grapevine are the advantages. The fine texture of the stone, the elegant light green, the transparency of the water, the appearance of the top ice jade, and the price is economical .
It is an orthorhombic system, and the crystals are mostly grape-like, stalactite-like and granular aggregates. Transparent to translucent, the color is yellow-green, brown-yellow, gray, white to colorless. It is mostly produced in the basic igneous rocks such as gabbro and diabase, which are the products of the hydrothermal alteration of the basic plagioclase. In the market, because the grape stone is relatively rare, the general ignorant or deliberate businessman will sell the green garnet as a grape stone. However, as long as you pay attention to the problem of inclusions, you can easily distinguish between green garnet and grape stone. Green garnets are generally rich in strips and needle-like inclusions, mostly green tourmalines or black tourmalines. Since the grape stone is formed under the effect of relatively low temperature hot water, it is rarely symbiotic with the minerals generated at high temperatures, and the formation temperature of the tourmaline is relatively high, so it should not coexist with the grape stone. Therefore, by observing the condition of the inclusions, the difference between the grape stone and the green garnet can be distinguished.
Grape stone, the most advanced in yellow-green, white, colorless is also popular. Due to the small amount of production, the general price is relatively expensive.
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