silver ring supplies The grade of colored gems

According to the traditional psychology and consumption customs of different countries (ethnic groups), diamanti, Rubies, zaffiri, smeraldi, high-quality cat’s eyes, alessandrite, opali neri, and extra-grade jade are usually listed as high-grade gemstones. Their prices are extremely expensive, a few per carat. The prices range from thousands to tens of thousands of dollars, and the prices increase unabated, especially the extremely large treasures and historically valuable collectibles, which are even more valuable. Inoltre, the colored gemstones have bright colors, buona trasparenza, certain hardness and good quality, such as golden emerald, spinello, white opal, ametista, topazio, olivina, granato, berillo, Acquamarina, tormalina, topazio, spodumene, andalusite, Tanzanite, zircone, ashlar, pietra di luna, Lapis lazuli, turchese, perla, nefrite (mutton fat white jade), and commercial grade jade They are all mid-range gems. Their prices in the jewelry market are much lower than high-end gems of the same quality, generally ranging from tens to hundreds of dollars per carat. Tuttavia, a few rare and high-quality mid-range gems can be sold for several dollars per carat. Dry dollars, such as demantoid, high-quality pearls, ecc. Some gems with special optical effects (starlight effect, effetto occhio di gatto) are of the same grade as their gems. Low-grade gems are generally produced in large quantities and relatively low in hardness. Per esempio, agata, calcedonio, cristallo, Xiuyu, malachite, fluorite, ecc., have lower prices. Regarding the classification of gemstone grades, there is currently no uniform standard. The gems provided by Baolong.com are all natural, including high, middle and low grades, which are convenient for customers to customize.

 

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