| 1 |
Metallurgy |
It is a technology of extracting metal by chemical methods, to extract metals from the mineral ores. Sometimes, they are called alchemy too. |
| 2 |
Refining |
It is a process of removing impurtities in the gold by two most common methods which are Miller process and Wohlwill process. |
| 3 |
Smelting |
It is the process of extracting metal from ore by using high pressure, heat and chemicals. Smelting gold involves high-technology and high cost tools to perform. |
| 4 |
Bullion |
Bullion is physical gold, silver or other precious metals in the form of bars, ingots or specialized coins that is said to maintain its value. |
| 5 |
LBMA |
LBMA is London Bullion Market Association. An international trade association representing the global bullion market and defines itself as “global authority on precious metals”. |
| 6 |
Yellow gold (jewellery) |
Yellow gold is the purest form in gold and for jewellery, it is made into alloy which contains pure gold, zinc and copper. |
| 7 |
White gold (jewellery) |
White gold is an alloy that mixed with palladium or nickel to give the colour silver or platinum. |
| 8 |
Rose gold (jewellery) |
Rose gold is an alloy that mixed with approximately 25% of copper which gives the pinkish colour. Sometimes, known as pink gold. |
| 9 |
Karat |
It is a gold measurement. It measures the fineness (purity) of gold. It is spelled Carat outside of United States. |
| 10 |
Alloy |
Alloy is an admixture of metal or a metal combined with one or more elements. For example, gold and copper produces yellow gold. |
| 11 |
Troy ounce |
Troy ounce is a unit of measure used to weighing precious metals that dates back to old days. One troy ounce is equal to 31.1g. |
| 12 |
Aqua regia |
A yellow-orange fuming liquid that can dessolve the moble metal gold and platinum. It is used to dissolved gold which used in industrial products such as circuit boards. |
| 13 |
Aurum |
Gold is a chemical element with the symbol which comes from Latin word “aurum”. Au seal maybe found in some white gold jewelleries. |
| 14 |
Dinar |
The modern Islamic gold dinar is a projected bullion coin and first issued in AH 77. The wieght of the dinar is 1 mithqal (4.25 grams). |
| 15 |
Precious metal |
Precious metals are rare, naturally occuring metallic chemical of high economic value. Gold, silver, platinum and palladium each have an ISO 4217 currency code. |
| 16 |
Gold tooth |
Gold tooth is a form of dental prosthesis where the vissible part of tooth is replaced with a prosthetic molded from gold. |
| 17 |
Gold plated |
Gold plated means jewellery made of a base metal such as copper or silver that has a very thin layer of gold applied to the top. |
| 18 |
Gold Filled |
Gold filled means jewellery is made by taking one or more sheets of solid gold and wrapped them around a base metal inder intense pressure. |
| 19 |
Vermeil |
It means gold plated sterling silver or fine silver, It is regular old plating except the underlying metal is silver instead of a base metal. |
| 20 |
Nugget |
It is gold fragment weathered out of an original lode. Nuggets are usually K20 to K22 in purity |
