RapNet


Rapaport News

 

Polished Markets

 
Rapaport 宣傳
Martin Rapaport Addresses Israel Diamond Week
February 12 2020

高級搜尋
最新文章
視訊
功能
新聞
挖掘
原石市場
拋光市場
製造
零售

Lab Spots New Method for Masking Synthetics

GSI receives stone that had been altered to resemble a natural diamond.
Feb 25, 2020 9:34 AM   By Rapaport News
Print 列印 Facebook Facebook Twitter Twitter 共用 Share
RAPAPORT... Gemological Science International (GSI) is urging extra diligence after receiving a lab-grown diamond bearing a treatment generally only found in natural stones.

“Diamond-growing technology continues to improve and growers are trying to mimic natural diamonds in every possible way,” GSI chief information officer Nick DelRe said Monday.

The organization’s Mumbai lab identified a synthetic stone that had been drilled into and given an inclusion using High Pressure-High Temperature (HPHT), which was then acid-bleached out. 

The remnants of the inclusion strongly resembled laser-drill treatment, which is generally used to remove black inclusions from natural stones to enhance their appearance, but is highly unusual for lab-grown stones, GSI explained. The lab stressed that there was a common misconception in the industry that a diamond can be identified as natural or lab-grown based on inclusions. In this case, an examination that was not thorough could have led to the conclusion that the diamond was natural, because it contained a laser-drill channel.

“There are no recorded cases of lab-grown diamonds with this treatment, nor would it currently make sense to laser-drill these diamonds,” GSI noted. “It is important to use proper processes, equipment and expertise when identifying diamonds.”

Image: The laser-cut lab-grown diamond. (Gemological Science International)
Tags: Gemological Science International, GSI, High Pressure-High Temperature, HPHT, lab-grown diamond, Nick DelRe, Rapaport News, synthetic diamond
Similar Articles
Comments: (0)  Add comment Add Comment
Arrange Comments Last to First



電洽: 1-702-893-9400
Member License Agreement   RapNet Trading Rules & Code of Conduct    私隱政策  
  
twitter twitter
關於 Rapaport
廣告業務