lab alexandrite gemstones

详情

Alexandrite are amazing gemstones for jewelry,because faceted gems undergo a dramatic color change in different types of light.In warm indoor incandescent or candle lighting,this gem is a rich purplish red color.In bright daylight,it is blueish green.Alexandrite have this color change because it includes chromium,which have different absorptivity to different light. ******************************************* Shanghai Chinese Crystal Manufacturing Co., Ltd. http://xxxxx http://xxxxx ******************************************** Our lab created alexandrite,like natural alexandrite,is a member of the chrysoberyl family which has the chemical composition beryllium aluminum oxide.In other words,our lab created alexandrite gemstones are chemically identical to alexandrite gemstones mined naturally.Because when buying lab alexandrite,because many dealers indiscriminately use the term for imitations(such as color-change corundum).The imitations have very little color change effect and the color is light baby blue in bright daylight,because they contain less element than true lab created alexandrite. The rate of our lab created alexandrite changing in color is **0%.In bright daylight,our lab created alexandrite is green with slightly blue,the color is the same with the one of the oriental emerald.In warm indoor incandescent or candle lighting,our lab alexandrite is red with slightly purple.The two colors in different types of light are so beautiful that everyone will be stuck on them as soon as he saw our lab created alexandrite. Our alexandrite rough is cut in HongKong,where the great care is taken to produce a facted gems which offers a full color change as one moves between warm indoor lighting to the full specrum of natural sunlight.Our lab created alexandrite gemstones have higher perfection than is nsually seen in natural stones.We are able to offer them at a small fraction of the cost of comparable natural stones.