[Rockhounds] Heliodore - gold beryl

[Ronald Werner]

Hi,

Just a short question about the "best" description/definition of heliodore as 
opposed to gold beryl.

I have googled and found a lot of conflicting information regarding the color of 
these varieties.

Can anyone recommend a reference/source for the demarcation between these varieties 
that will hold in an official context?

On beforehand thanks for your help!

Ronald Werner
Evje og Hornnes Geomuseum på Fennefoss
Norway

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