fourninesAU
Member
- Joined
- Jul 24, 2011
- Messages
- 14
Hello,
I am not a refiner, just a scrap gold buyer, so please forgive my ignorance. Thanks for any replies.
I have been using Republic Metals Corp in Miami and been very pleased with their service but want to give NTR Metals a try. I spoke with a rep there who told me that they will melt my material then do XRF analysis.
I do not understand how this is different than what Republic does, where they melt the lot then x-ray the sample to determine the fineness and pay me based on that. Yet he described their process as fire assay, whereas NTR is not doing a fire assay (yet they are still melting the lot into a single bar, then x-raying). I don't understand the difference, and the implications of XRF vs fire assay (which I have heard is more accurate).
I am bringing in a small test lot of karated gold which should melt out to around 10ozt fine. I developed a spreadsheet that calculates average fineness after I put in the weights of everything 9K-24K, then determines plumb yield (which I know jewelry is almost never plumb). So far my results with Republic have been that my lots have melted to around 2% less than plumb. Could I expect similar results with XRF?
Thanks again.
I am not a refiner, just a scrap gold buyer, so please forgive my ignorance. Thanks for any replies.
I have been using Republic Metals Corp in Miami and been very pleased with their service but want to give NTR Metals a try. I spoke with a rep there who told me that they will melt my material then do XRF analysis.
I do not understand how this is different than what Republic does, where they melt the lot then x-ray the sample to determine the fineness and pay me based on that. Yet he described their process as fire assay, whereas NTR is not doing a fire assay (yet they are still melting the lot into a single bar, then x-raying). I don't understand the difference, and the implications of XRF vs fire assay (which I have heard is more accurate).
I am bringing in a small test lot of karated gold which should melt out to around 10ozt fine. I developed a spreadsheet that calculates average fineness after I put in the weights of everything 9K-24K, then determines plumb yield (which I know jewelry is almost never plumb). So far my results with Republic have been that my lots have melted to around 2% less than plumb. Could I expect similar results with XRF?
Thanks again.