Dont know where to post this, but I believe this is a good place for my question.
I looked at the video regarding SG and it looked okey until the stone was immersed in water by using the hand. To get an accurate reading that should be avoided by using a stoneholder, yes, like she did when she put the stone on the scale in the first place... avoiding dirt/grease/fat from fingers should be a priority... yes?
Joined: Sun Oct 16, 2005 12:22 pm Posts: 21602 Location: San Francisco
Speaking as the person who made the video, I can say using tweezers certainly can't hurt.
I will clean a gem very thoroughly BEFORE beginning any testing.
I know that my readings are usually quite accurate. Sometimes I drop the stone in with my hands other times I'll use tweezers. Depends what is more convenient. You'll notice the SG that I got with the demonstration video was correct....there was NO error with the result.
If you use a lot of lotions, or have sweaty, dirty, mucky hands use tweezers. .
Indeed, your video is nice, but I just thought it would be even nicer to tell the viewer that to obtain a good reading (esp. more important if you do not have such a good instrument as you used in the video) that grease/dirt is not good when trying to obtain a SG reading, that you should clean the stone BEFORE as you stated. I just miss that info in the video else it is nice as i mentioned earlier.....
:)
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