Three Methods Of Assay For Raw Precious Metals...

Items of jewelry or art made of precious metals are hallmarked based on specific requirements either of the country of import or the place of manufacture

posted on: Aug 3, 2014 | author: admin

The Six Precious Metals Of The Platinum Group...

In the periodic table of elements, six metallic elements are bunched together in the d-block, specifically in groups 8 to 9, periods 5 and 6.

posted on: Aug 3, 2014 | author: admin

The Four Platinum Bullion Coins: A Brief Description Of Each...

Bullion coins are coins made from precious metals. Their market values are determined by their inherent precious metal contents

posted on: Aug 3, 2014 | author: admin

The Eight Precious Metals Considered Noble Metals...

Most metallic chemical elements are known to easily oxidize and corrode, especially at high temperatures.

posted on: Aug 3, 2014 | author: admin

Safety Issues Concerning Precious Metals...

The metallic chemical elements collectively known as precious metals are called as such because of their extreme rarity and high economic value. Precious metals occur naturally or are by-products of the processing of other less rare metals. In order of increasing mass abundance (parts per billion), the precious metals are rhenium, rhodium, iridium, ruthenium, osmium, gold, platinum, palladium, and silver. These metals are not radioactive and are mostly used for industrial purposes and for jewelry. Still, precious metals have some safety issues attached to them: Rhenium: Since rhenium is used in very small amounts, its toxicity is virtually unknown. The hazardous property of rhenium halide, for example, may be attributed either to rhenium itself or to the other...

posted on: Aug 3, 2014 | author: admin

Precious Metals Discoverers And Name Etymologies...

The group of precious metals consists of two coinage metals, six platinum group metals, and one metal considered the last naturally occurring stable element to be discovered. Except for gold and silver (the two coinage metals), the rest of the precious metals have recorded discoveries. In the following list, the names of the discoverers and name etymologies of the seven precious metals (again, those with recorded discoveries) are provided. The year of discovery of each of these elements, as presented here, refers to the year when the element was first identified as the pure element. Also provided are their respective name etymologies. 1. Platinum – Antonio de Ulloa, a Spanish explorer and astronomer, is generally credited with the...

posted on: Aug 3, 2014 | author: admin

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