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Author:  Ruby3 [ Thu Feb 14, 2019 11:05 pm ]
Post subject:  Done

1. Anyone ever challenge a gemstone on a final?

Author:  dchallener [ Fri Feb 15, 2019 12:42 am ]
Post subject:  Re: Challenging a gemstone on my 20 stone final test

Really? Blue-green sphene? I didn't know it came in that color.

Author:  1bwana1 [ Fri Feb 15, 2019 6:15 am ]
Post subject:  Re: Challenging a gemstone on my 20 stone final test

From what I have heard, you will not prevail on a challenge based on the concept that the stone was not representative, or misleading. Only a stone that was misidentified by the person who made the test set, and your ID was correct will result in a successful challenge.

Situations like this can be very frustrating. Test stones are normally not misleading, and are supposed to be purposely selected to be straight forward IDs the just test your knowledge, use of tools, and process.

Best to move on and just do the test again, and get 20 correct. From the sound of your logic, you are competent and will pass next time.

Don't be sad!!!

Author:  Ruby3 [ Fri Feb 15, 2019 2:43 pm ]
Post subject:  Re: Challenging a gemstone on my 20 stone final test

I received an email back saying the stones are commonly confused, and the stone had a 580 doublet line. I thought I saw a zircon cut off.
I asked to come back in to see the doublet line as a learning experience. He also said the SG was closer to the sphene. I have to go check my notes on if Sg was diagnostic. My lab book says eye visible doubling and eye visible strong fire was diagnostic, which it had neither.
You have to pay another pro rated fee, and drop down into another class after you failed all your attempts.
Missing with a deceptive stone is what makes it frustrating.

Author:  Stephen Challener [ Fri Feb 15, 2019 6:09 pm ]
Post subject:  Re: Challenging a gemstone on my 20 stone final test

Blue green sphene? How green or how blue are we talking?

Author:  Barbra Voltaire, FGG [ Fri Feb 15, 2019 11:34 pm ]
Post subject:  Re: Done

To begin with Ruby3, you have committed the ultimate sin on this platform.
That is, removing information that our members have taken the time to read and respond to.

So, this was a doublet? You'd have 2 stones to identify then.

What do you have to challenge? You misidentified the stone.

Yes, it was difficult but we have difficult identifications to make all the time.
Consider the legal ramifications if you were being paid for an identification and you blew it.

Author:  Stephen Challener [ Sat Feb 16, 2019 12:31 am ]
Post subject:  Re: Done

I think he way saying it had a doublet line in the light spectrum rather than that the stone itself was a doublet.
But yeah, why remove the initial information?
I am still doubtful about the existence of blue-green sphene, or at least the sufficiently-prevalent existence for it to end up on a test. Sphene can be a nice pure green, maybe leaning the slightest bit blue (?) but blue green?

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