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 Post subject: Help identify Nat or Syn Citrine
PostPosted: Wed Aug 26, 2020 7:55 am 
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Joined: Sun Jul 19, 2009 11:15 am
Posts: 47
Location: indonesia
I bought a parcel of Madeira-color Citrine weight more than 20 cts each. Under microscope there are no typical syn quartz inclusions like seed plate, bread crumbs nor nailhead spicules. All I can see is :
- Veil-like cloud, some are curved like striae in Syn Corundum.
- Straight cloud plane
- Straight plane with tiny needles that looks like intersecting each other.

Here are some photos of them. Thank you for helping.


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 Post subject: Re: Help identify Nat or Syn Citrine
PostPosted: Wed Aug 26, 2020 9:54 am 
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Joined: Thu May 12, 2016 2:18 am
Posts: 1006
Look for dichroism and post your results.


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 Post subject: Re: Help identify Nat or Syn Citrine
PostPosted: Wed Aug 26, 2020 1:15 pm 
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Location: North Carolina
Needles are typical of natural quartzes, particularly irradiated yellow quartzes from Brazil (lemon quartz). I've never heard of them in synthetic quartz though I haven't necessarily heard of it as a diagnostic feature either. My gut would say they don't occur in synthetics though.

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