Plumb vs. Repair Jewelry Solder

Plumb vs. Repair Jewelry Solder

Jewelers and manufacturers alike will often send in pieces for assay verification. From time to time, we find when using XRF analysis, the consistency of the karating varies in different spots on any given piece. This is usually the result of a repair utilizing a lower karat jewelry solder. When it comes to ordering solder, […] Read More...

X-Ray vs. Fire Assay

Fire assay is an age-old technique that has been used for thousands of years for the determination of precious metals content. It provides unmatched accuracy for the determination of gold in any given sample. During the last few decades, X-Ray Fluorescence (XRF) systems have become increasingly popular. These systems are very appealing considering their relatively […] Read More...

Diamond and Stone Removal

Many of United’s customers utilize the stone removal services offered to safely extract stones from finished jewelry sent in for refining. One of the most frequently asked questions is:   “Which stones survive the process, and which do not?”   Here is a list to answer this frequently asked question: GEMSTONE Heat Resistance Acid Resistance […] Read More...

100% Recycled Gold Sourced from The Pawn Industry

Since 1988, United has been working with pawnbrokers to source scrap gold and silver. Read More...

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Prices shown are for reference only. Please contact our trading desk for accurate, up-to-the-minute pricing.


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