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 Post subject: Malaya Garnet Turn Green Under UVB?
PostPosted: Mon Mar 01, 2021 8:55 am 
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Joined: Sun Feb 28, 2021 8:03 pm
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Hello all — I recently came across a beautiful stone marketed as Malaya garnet from Mahenge region. It display the typical color shift (orange red to pink to light cinnamon) in variety of lighting environments. It contains fine rutile that’s slightly visible under strong direct light or under the loupe. It is also magnetically responsive. When I put it under the 311nm UVB light, it turned green, which is very unusual. Anyone can offer any insights? Could it be something else? I am attaching some videos and pictures for your reference.

Turn green:

Regular light1:

Regular light2:

Magnetic drag:

Thanks.


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File comment: Rutile inclusion
Malaya Inclusion.jpg
Malaya Inclusion.jpg [ 57.75 KiB | Viewed 3687 times ]
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 Post subject: Re: Malaya Garnet Turn Green Under UVB?
PostPosted: Tue Mar 02, 2021 2:56 pm 
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Joined: Sun Oct 16, 2005 12:22 pm
Posts: 21600
Location: San Francisco
My first thought is that standard gemological long wave and short wave UV light is 254nm/365nm.


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