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Elizabethhunts

Rough_Rock
Joined
Jun 22, 2020
Messages
96
20200702_212548.jpg 20200702_212411.jpg 20200702_212728.jpg 20200702_212339.jpg 20200702_212606.jpg
Tomorrow im some in to the jewler for appraisal, and for examination.really interested to see what he tells me about these beads? 20200702_213734.jpg 20200702_213648.jpg
 

Bron357

Ideal_Rock
Premium
Joined
Jan 22, 2014
Messages
4,340
Hi Elizabeth, to test gems for their UV fluorescence you need the correct UV light wave length.
Then you need to understand what glowing or not glowing and what colour the “glow” is to help identify the gem.
Identifying gems is usually a multi step process with different types of tests to help confirm identity.
For example, you don’t want a piece of green jade with fluorescence because that’s a strong indication of being dyed!
This is the type of UV penlight you can buy online. Best used in a darkened room.
1F1F457C-D9D6-44FB-861A-0C9CB9C337C4.jpeg
 

Elizabethhunts

Rough_Rock
Joined
Jun 22, 2020
Messages
96
Hi Elizabeth, to test gems for their UV fluorescence you need the correct UV light wave length.
Then you need to understand what glowing or not glowing and what colour the “glow” is to help identify the gem.
Identifying gems is usually a multi step process with different types of tests to help confirm identity.
For example, you don’t want a piece of green jade with fluorescence because that’s a strong indication of being dyed!
This is the type of UV penlight you can buy online. Best used in a darkened room.
1F1F457C-D9D6-44FB-861A-0C9CB9C337C4.jpeg
Is using a stronger light going to affect the outcome? Im using a 600, and wondered if i would have any luck, and i did! Its very hard to hold the camera and the light. Hopefully I can capture at least one good photo. My phone died mid act. BLAH
 

yssie

Super_Ideal_Rock
Premium
Joined
Aug 14, 2009
Messages
20,756
Is using a stronger light going to affect the outcome? Im using a 600, and wondered if i would have any luck, and i did! Its very hard to hold the camera and the light. Hopefully I can capture at least one good photo. My phone died mid act. BLAH
I suspect 600 is not "strength" of light but wavelength.
Different gemstones fluoresce under different wavelengths, as @Bron357 was explaining.
The wavelength you want (what GIA uses for diamonds) is 365nm.
 

Karl_K

Super_Ideal_Rock
Trade
Joined
Aug 4, 2008
Messages
10,030
6000nm would be orange so maybe 600 is a model #?
What I find interesting is how reactive parts of the cloth they are on is to uv.
My guess is its the low cost 380-390nm leds in the light.
99% of them are.
 

Dancing Fire

Super_Ideal_Rock
Premium
Joined
Apr 3, 2004
Messages
32,088
I'm confused. What is OP try to prove?? :confused:
 

dk168

Ideal_Rock
Premium
Joined
Jul 7, 2013
Messages
6,219
I'm confused. What is OP try to prove?? :confused:
That the stones/pieces could be of value, as in real diamonds and gemstones being mis-sold as costume jewellery that the OP had purchased.

That's my understanding from another thread.

DK :))
 

Dancing Fire

Super_Ideal_Rock
Premium
Joined
Apr 3, 2004
Messages
32,088
That the stones/pieces could be of value, as in real diamonds and gemstones being mis-sold as costume jewellery that the OP had purchased.

That's my understanding from another thread.

DK :))
I knew that... ;)) Just wanna hear it from OP.
 

Karl_K

Super_Ideal_Rock
Trade
Joined
Aug 4, 2008
Messages
10,030
600nm would be orange so maybe 600 is a model #?
What I find interesting is how reactive parts of the cloth they are on is to uv.
My guess is its the low cost 380-390nm leds in the light.
99% of them are.
fixing typo
 

AprilBaby

Super_Ideal_Rock
Premium
Joined
Jul 17, 2008
Messages
10,946
That proves you have blue And purple light...
 

PintoBean

Ideal_Rock
Premium
Joined
Jul 27, 2011
Messages
6,461
Does it matter if it's UV-A, UV-B, or UV-C?
 
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