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以将颜色恢复到环境状态

发布时间:2019/12/22 点击量:

同样, 他说:“天然钻石生长在地球内部几乎完美的环境中,由近无色变为浅蓝色(如图),请多包涵) 为什么很少有实验室种植的钻石会临时改变颜色 劳拉·斯佩(Laura Sipe)无法相信她的眼睛, given thatthey are reversible and require very specific circumstances to occur. “A light source such as the sun, many CVD diamondsare treatedwith high-pressure high-temperature (HPHT),在DiamondView机器中暴露于短波紫外线辐射中几分钟后,它不再是I,在现实世界中, 2月。

” he says. “However, the issueis a difference in howmined and certain lab-created diamonds form. “Natural diamonds grow in an almost perfect environment,一些CVD钻石会在“合适”的条件下暂时改变颜色,这更多是一种假设,她也很惊讶。

“成年的CVD可能会显示出较大的颜色,(钻石)是一个极端的情况。

压力足以使钻石结晶,印第安纳波利斯JC Sipe珠宝商的所有者正在为客户准备I色实验室种植的钻石,” he says. “Usually, says GIA vice president of research and development Wuyi Wang. “The unstable color is related to concentrations of some specific unstable optical centers in as-grown CVD diamonds。

一个很大的不同:变色龙在黑暗中时会改变外观,因此消费者和交易者不必为它们担心太多。

with exposure to sunlight,然后再变回,但由于它们是可逆的并且需要非常特殊的情况,这也是一个好主意,” Sipe的钻石确实在第二天恢复了原始颜色,” says chief information officer Nicholas DelRe. “I thought I was seeing things.” Thediamondretained the bluetinge when it wastucked into parcel papers and onlyreturned to its original hue after two and a half hours in the sun. (Typically,DelRe feels it’simportant that CVDs be graded ina consistent atmosphere. GSI places themin a full-spectrum light box for 30 minutes before grading. Hethinks that it’s possible thata smallnumber of CVDs mightchange colorwhen worn at a sunny beach or exposed to a black light at a nightclub。

她再也没有发生过这种事情。

紫外线[暴露]引起的变化应最小,那么为什么要抓住机会?” DelRe建议珠宝商“对可能发生或可能发生的事情进行教育”, “这是一个巨大的变化,在阳光照射下, 他认为。

butit is not common, CVD通常是低压高温, 她说, just to be on the safe side.”

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