An assayer is a scientist who examines different types of minerals and ores in order to determine their properties. Some of the strategies used in this analysis will allow the assayer to actually separate the various ores and alloys from one another, making it much easier to determine the sample’s exact composition. Some assayers specialize in analyzing samples in order to identify specific ores or metals, such as gold or silver. In other cases, an ore tester is hired to identify any type of mineral content, allowing researchers to determine which precious metals are likely to be found in a given area.
An assayer will use several different methods to accurately determine the ore and mineral content of a sample. Chemical solutions used in strict laboratory conditions allow for the identification of what is and is not present in the sample. The solutions can also be used to separate the different ores, making it easier to figure out how much of each is present. Dry methods are also used in assaying, with one example being the application of heat to the sample. This strategy can cause certain ores to coalesce into slag, which can help determine which elements are present in the sample and which are not.
An assayer can use a variety of methods to refine any elements present, in addition to separating and identifying various ores in a sample. A silver or gold assayer, for example, can refine any amount of precious ore that is discovered to make the sample less brittle. This makes determining the assay balance, which is simply a process that aids in the identification of gradations in the sample, much easier. The balance is used to determine how much gold or silver can be extracted from the general area where the sample was taken.
Assayers are frequently employed as full-time employees or independent consultants mining companies. This allows for a more accurate assessment of the viability of starting a mining operation in a given area before purchasing land or investing a significant amount of time and resources in what is known as a blind dig. The company can get the most out of the mining operation while keeping costs as low as possible enlisting the help of a qualified assayer.