Luster description? standard scale?

[kallard]

I thought I had read about this somewhere, but don't know where.

Is there a standard for describing gemstone luster? I know there is one technically (using metallic, waxy, etc.) when it comes to rocks....but is there a standard for gemstones?

 

[MollyMalone]

Might you be thinking of Chrono's April 25, 2012 post on the first page of the New to coloured gemstone buying? Read this first! sticky that's "pinned" near the top of the CS forum's index page?
https://www.pricescope.com/community/threads/new-to-coloured-gemstone-buying-read-this-first.174284/

 

[kallard]

That is where I thought I had read it, but it isn't actually in that article.

I did find it though!

After you reposted the link, I reread, but then scrolled father down the page and found it in a follow up comments regarding "brilliance".

I was finding some vendors describing "luster" as excellent or other subjective terms, and remembered that I had read something about this somewhere.

Thanks.