In the art auction market, mature gemstones that have been recognized by the market tend to be relatively easy to maintain, but there is limited room for appreciation. And those gemstone varieties that have not yet been sought after by the world, but have been included in the bag for collectors, are the real potential stocks, and spinel is the representative. In this autumn's autumn shoot, many spinel boutiques will undoubtedly allow collectors to understand their true value. When you mention the spinel, you have to mention that the "ruby" in many royal jewels was later confirmed as a spinel, including the 170-carat "Black Prince Ruby" in the British crown. In the eyes of the industry, the spinel identified as a gemstone is actually more rare than the average ruby. Therefore, spinel has not been sought after in the market in the past, and its price is at a low level. However, spinel has been favored by gemologists in the past few decades, and prices have steadily increased. From the perspective of investment, spinel is worthy of attention. Spinel has a full color, toughness and shiny ruthenium, so it is often mistaken for corundum. In addition to red, blue spinel is also popular among collectors. Although "iron" and "zinc" can make the spinel appear blue, the spinel colored by "cobalt" is rare and rare. What is special is that it emits a lightning-like seven-color fire like a diamond. color. Very few spinels sometimes exhibit a special optical phenomenon of discoloration, which is one of the reasons why this diamond ring of this auction is particularly concerned. The picture above shows the color change of this ring, with blue on the left and purple on the right. Roller Blind Curtain Shade Gauze Zebra Using double-layer fabric, adjustable light, do not take up space. Not only the advantages of cloth and yarn are combined, but also the function of a hundred leaf curtain, a roll curtain, and a Roman curtain. European style, double-layer transparent curtain design -- the middle transparent curtain has a louver curtain open dimming function, adjust the angle of the curtain, can make different light permeability curtains overlap, with a soft texture. Locally adjustable light. Zebra Shades Window Blinds,Zebra Window Blinds,Zebra Shade Blinds,Roller Blind Curtain Shade Gauze Zebra SHAOXING XIANHENG INTERNATIONAL LTD. , https://www.sxcurtain.com