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 Post subject: Bicolor Chrysoberyl Exist in nature?
PostPosted: Sat Feb 25, 2023 10:59 am 
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Hi gem expert, is it true that yellow-teal bicolor chrysoberyl can occur naturally? A collector from Kunming showed me something that I think did not exist. At first I thought this is a tourmaline. Then he allowed me to take the stone off for checking. The RI match chrysoberyl. Then I immersed it in oil and cant found any unnatural sign. As for the inclusion, nothing catch my eye beside several crystals and cracks under 10x loupe.

Cant test it any further cause at that time I didnt have access to microscope, dark field loupe. not to mention those advance equipment.

One more weird think is that I saw a straight brown zoning in the teal part of the stone.

Have you see anything like this?

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 Post subject: Re: Bicolor Chrysoberyl Exist in nature?
PostPosted: Sat Feb 25, 2023 2:41 pm 
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Location: San Marcos, CA
I think a simple SG reading while it was out might have separated your two curiosities. Honestly it looks like tourmaline with partial or full closed C axis. But it is just a picture so all just speculations. Yes have seen similar.

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 Post subject: Re: Bicolor Chrysoberyl Exist in nature?
PostPosted: Sun Feb 26, 2023 10:17 pm 
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My dad has a really nice bicolor alexandrite.

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 Post subject: Re: Bicolor Chrysoberyl Exist in nature?
PostPosted: Tue Feb 28, 2023 2:42 am 
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Yes we have also a bicolor Chrysoberyl. And I saw some in the market.
mostly brown yellow as I know.

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 Post subject: Re: Bicolor Chrysoberyl Exist in nature?
PostPosted: Tue Feb 28, 2023 10:13 pm 
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Joined: Fri Jun 25, 2010 10:06 pm
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Location: Chapel Hill, NC / Toronto, ON
I have a bicolour chrysoberyl from Brazil that transitions from brown-yellow to greenish-yellow. So yes, they do exist :)


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