How to preserve the value of semi-precious stones
In gemology, gemstones are generally divided into precious gemstones and semi-precious stones. There are four main types of precious stones, namely diamonds, rubies, sapphires and emeralds. In the jewelry market in recent years, semi-precious stones represented by tanzanite, aquamarine, crystal and agate have also attracted more and more attention from collectors. At present, with the popularity of crystal jewelry, the other semi-precious stones crafts are selling well, and the other semi-precious stones are attributed to the scope of generalized crystal. The main semi-precious stones are: tourmaline, crystal, lapis lazuli, topaz (topaz), hailanbao, garnet, peridot, tiger eye stone (wood stone), labradorite (moonstone), star stone , obsidian, malachite, turquoise, red stone, purple dragon crystal, Dongling jade, fluorite, agate, chalcedony, Czech meteorite, opal, Shujialai stone, spodumene, calcite and so on. In addition, organic gemstones, amber, pearls, and corals are also classified as semi-precious stones. Perhaps you will be familiar with the name of a semi-precious stone. The prototype of "Taiwan" is not a blue diamond, nor a sapphire, but a tanzanite; the crown of Catherine II, the largest The most beautiful red velvet gems, not rubies, but red spinels. As semi-precious stones become more and more familiar to collectors, their value has also risen sharply. For example, in the case of tanzanite, in the beginning of 2011, the price of medium-quality tanzanite was only around 900 yuan per carat. In just over a year, by 2012, the price has risen to around 2,500 yuan per carat, which has nearly doubled. The current price is even higher. Rayon Viscose Satin,Rayon Digital Printed,Rayon Kechaw,Rayon Keqiao Shaoxing Shangda Textile Co., Ltd , https://www.shangdatex.com