Fluorescence with short wave UV light

[Rockcollector]

My non fluorescent diamonds under a shortwave UV light ( the type archaeologists use on glassware to determine lead content and so forth)

 

[Karl_K]

Do you have a link to the light used?

 

[Rockcollector]

It’s a short wave UV light my sister (archaeologist) uses with her work. She will photograph the label on the light when she returns to work this week.

 

[Karl_K]

ok the reason I asked is many of them are 400nm+ which is different than 365 and changes the response. Also none means less than faint not absolutely none.

 

[oldminer]

Shortwave UV is a critical tool for screening for Lab Created diamonds versus Mined stones. Most Lab Created diamonds have unusual short wave UV fluorescence when exposed to UV at 254nm and even more reaction at shorter UV wavelengths.

Nearly all near colorless Lab diamonds have no long wave fluorescence. The near colorless Lab diamonds all transmit short wave UV and 98%+ of the near colorless colorless range of diamonds absorb short wave UV. This alone is 2nd highly useful screening process for the majority of diamonds the jewelry business uses.

Putting your hand or eyes into SWUV light is dangerous. You need to protect yourself for short wave light at all times.

 

[DejaWiz]

Shortwave UV is a critical tool for screening for Lab Created diamonds versus Mined stones. Most Lab Created diamonds have unusual short wave UV fluorescence when exposed to UV at 254nm and even more reaction at shorter UV wavelengths.

Nearly all near colorless Lab diamonds have no long wave fluorescence. The near colorless Lab diamonds all transmit short wave UV and 98%+ of the near colorless colorless range of diamonds absorb short wave UV. This alone is 2nd highly useful screening process for the majority of diamonds the jewelry business uses.

Putting your hand or eyes into SWUV light is dangerous. You need to protect yourself for short wave light at all times.

To add: the reason why protection is needed is because no SWUV (UVC) and almost all MWUV (UVB) reaches the earth, as it gets blocked by the atmosphere.

Useful for identifying gemstones or discerning LGD?
Yes.

Useful for determining actual, real-world diamond fluorescence or phosphorescence?
No, not in my opinion.

 

[Rockcollector]

So I am thinking that it may be a uv light for detection of minerals. It looked like a wand and she said it cost over $200. Neither of my diamonds had fluorescence with a regular uv light nor on the certs. They’re supposed to be real as they came from reputable jewelers and I have a GIA very for the emerald cut and an EGL for the round. The smaller stones in the other ring that had fluorescent were from Bluenile.