Method and detection device used for distinguishing natural gemstone and synthetic gemstone

A technology for synthetic gemstones and detection devices, which is used in testing jewelry, material excitation analysis, fluorescence/phosphorescence, etc., can solve the problems of complex, unsuitable light-emitting devices, distinguish synthetic diamonds from natural diamonds, etc., and achieve accurate distinction, convenient operation, Detect simple effects

Inactive Publication Date: 2016-02-24
SHENZHEN JEWELRY RES INST NAT GEMS & JEWELRY TECH ADMINISTATIVE CENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thermoluminescent devices are complex and expensive, and may not be suitable for differentiating synthetic diamonds from natural diamonds
[0006] Base

Method used

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  • Method and detection device used for distinguishing natural gemstone and synthetic gemstone
  • Method and detection device used for distinguishing natural gemstone and synthetic gemstone
  • Method and detection device used for distinguishing natural gemstone and synthetic gemstone

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Embodiment Construction

[0038] In order to express the present invention more clearly, the present invention will be further described below in conjunction with the accompanying drawings.

[0039] The method for distinguishing natural gems and synthetic gems of the present invention comprises the following steps:

[0040] Step 1, irradiate the surface of the sample with continuous-wave ultraviolet light with a wavelength of 220nm-360nm; the surface of the sample and the area directly below the surface will be irradiated; fluorescence and phosphorescence will be excited to form a fluorescent image that reflects the growth of the irradiated area, and phosphorescence can be formed when the radiation is turned off luminescent image;

[0041] Step 2, according to the fluorescence image and phosphorescence pattern, observe the difference in image characteristics, so as to determine whether the gemstone is natural or synthetic; if the image shows no phosphorescence, blue-white fluorescence, and horn-like gr...

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Abstract

The invention discloses a method and a detection device used for distinguishing natural gemstone and synthetic gemstone. The method comprises following steps: continuous wave band ultraviolet light with a wavelength ranging from 220 to 360nm is used for irradiating sample surfaces; sample surfaces and surface right lower regions are irradiated; fluorescence and phosphorescence are excited so as to form fluorescence images capable of reflecting growth of the irradiated regions, and phosphorescence illuminate images are formed when irradiation is shut down; image characteristic difference is obtained via observation based on the fluorescence images and the phosphorescence illuminate images so as to determine that the detected samples are natural gemstone or synthetic gemstone; if the images are not capable of emitting phosphorescence and blue white fluorescence, and horny growth patterns are observed, the detected samples are natural gemstone; if the images are capable of emitting phosphorescence, blue green or yellow green fluorescence, and layered growth structures and octagonal growth structures are observed, the detected samples are synthetic gemstone. According to the method, only the surface regions of gemstone are irradiated without influences by other factors, and it is possible to determine the detected samples are natural or synthetic based on patterns, or fluorescence, or phosphorescence generated by the gemstone samples.

Description

technical field [0001] The invention relates to the technical field of gemstone detection, in particular to a method for distinguishing natural gemstones from synthetic gemstones and a detection device thereof. Background technique [0002] Gem refers to the natural output, which is beautiful, durable, rare, has craft value, and can be processed into decorations. Common gemstones are: diamond, ruby, sapphire, emerald, emerald, Hetian jade, etc. Diamond is called the king of gemstones, and these gemstones are divided into natural, synthetic and processed. At present, there are two main ways to distinguish whether gemstones are natural or synthetic: [0003] One is to use ultraviolet light to excite gemstone fluorescence, and enlarge observation and record. Representative products and patents include DiamondView diamond viewer and the ultraviolet light excitation image observation method disclosed by Shigley et al. This is used to study growth zones. This excites impurity l...

Claims

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Application Information

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IPC IPC(8): G01N21/64G01N21/87
Inventor 兰延陆太进张丛林张天阳
Owner SHENZHEN JEWELRY RES INST NAT GEMS & JEWELRY TECH ADMINISTATIVE CENT
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