Fire Assaying is the oldest and most reliable method of determining gold and silver in rock or concentrate samples. This method is still the industry standard. It is called ”fire” assay because it involves smelting the sample which has been mixed with lead oxide. Until electric furnaces were available, samples were smelted literally in a fire. It is a destructive process where the gold is melted with the process of cupellation removing all the impurities and the process of parting separates the silver from gold.The results are then derived by weighing the pure gold cornets. Fire Assaying is the most accurate process for testing gold. Variety hallmark is benefited by trained and strong manpower with professional and experienced metallurgist to analyze and derive accurate and precise results.
XRF (computer Testing)
X-ray fluorescence analysis (XRF), one of the best analytical techniques to perform elemental analysis in all kind of samples, no matter if liquids, solids or loose powders have to be analyzed. XRF combines highest accuracy and precision with simple and fast sample preparation for the analysis of elements from Beryllium (Be) to Uranium (U) in the concentration range from 100% down to the ppm-level.XRF (x-ray Fluorescence) is a non destructive process of analysis of precious metals. Variety Hallmark has highly advanced and sophisticated German based X-ray machines to derive accurate and precise results of precious metals with the help of X-ray technology . These machines are also capable of testing Gold , silver, platinum and 108 metals and non metals. The emission of rays determines the purity of jewellery which is derived with the help of the computer.
The hallmark jewellery has four marks, the BIS standard mark, Hallmark purity mark, the hallmarking centre Logo and the jewellers Logo or identification mark.The hall marked jewellery and failing without hallmarking jewellery is handed out end of the process when the jeweller comes to take it back.
It is useful in repairing of finished jewellery. It solders just beside stone without any damage. No need to polish jewellery again.Laser soldering is often used as selective laser soldering. Parts which can not be soldered with reflow or wave are soldered selectively. These can be parts which are particularly sensitive to temperature or, due to their size, need a special temperature program for soldering.All process parameters like energy intake, spot size and control parameters are individually matched to every soldering joint, thus achieving supreme connections even under challenging conditions.
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Gold testing certificate
The entire process of weighing, melting, verifying the purity and issuing the certificate of purity is completed within 45 minutes. The customer witnesses the entire process, which is carried out in a transparent, easy-to-understand and professional manner. Time slots for availing these services can be booked online for ease of convenience.Weighing balances and XRF are calibrated daily, using certified check weights and internationally tested reference samples. Our range of reference calibration samples is the most exhaustive in the country, which assures our verification process is conducted to the highest international standard.