MELTING

 Our preferred method of melting is by induction. The purpose of melting is to burn off some of the impurities and get homogeneous material for sampling.  Material is heated up to over 2200 F to ensure that. Once the material is homogenized, samples are taken by dipping glass vacuum pins to molten metal. This is the most accurate sampling technique accepted within the industry. Samples are sent to our laboratory and molten metal is poured into molds to create ingots. 
 
Our induction furnaces are capable of melting anywhere from few ounces to 1000 ounces  per melt.

Gemstone removal

What is a Diamond and Gemstone Removal Process?
In a nutshell, the process involves mainly dissolving the jewelry in glass or titanium reactors, so stones become loose and collected easily. It is a small-scale refining process. For gold, Combination of nitric acid and hydrochloric acid is used in different ratios. For silver, only Nitric acid is utilized.  Once gold is dissolved, diamonds are collected, washed and dried. Even the smallest diamonds can be recovered and there is absolutely no loss on your diamonds. Subsequent steps involve precipitating the dissolved gold back to metallic form with other reducing chemicals, then filtering, drying and melting the gold sponge to a bar form.  We are proud to offer one of the fastest turnaround times in the industry.  We complete this labor-intensive work in eight hours, essentially having the same day process. Our customers are welcome to visit our location and witness the entire process.  We also provide complimentary frosting process for cubic zirconium. This process involves washing the entire diamond lot with a different acid that makes CZs frosty white so it is very easy for our client to separate them even with naked eye.

Why Should You Use Gemstone Removal Process?
It is simple, removing small diamonds and gemstones from any kind of setting is time consuming and labor intense work. Manually removing stones also results in chipped, broken, cracked and lost stones.  The gemstone removal process would same you time and money and maximize your return when you resell your stones.  

Assay analysis

XRF-X ray fluorescence
X-ray Fluorescence (XRF) is non-destructive analytical technique that uses the interaction of X-rays with a material to determine its elemental composition. XRF is suitable for solids, liquids and powders, and in most circumstances is non-destructive. XRF spectroscopy is an effective method for qualitative and quantitative analysis of material composition.
We utilize this technology to settle smaller size lots and also have a initial starting point to our fire assay analysis technique.


Fire Assay
Fire assay is the most accurate technique to determine the value of gold and silver in a material. It began to appear in literature in the 12th century in England and spread out to the rest of Europe. The purpose of fire assay is to separate gold and silver from all other impurities in the material. It involves two steps, the first one being “Cupellation”. In this stage, a carefully weighted half gram sample is fused in a cupel furnace resulting all base metals oxidize and sucked by cupel leaving only gold and silver baring bead. The second step is called “parting”. In this stage, remaining bead is boiled in chemically pure nitric acid to separate the silver from gold. The resulting material is pure gold and the ratio of the gold weight to beginning sample weight determines the purity of the sample. We assay with three samples instead of two to ensure perfect results and each assay is “Proof Corrected”. A proper fire assay takes around five to six hours to complete.