Secondary deposit

Secondary Deposit
A deposit of gems that has been worn away from its original site, usually by the effects of weather. An alluvial deposit is an example of a secondary deposit.

Secondary Deposits:
Although a primary deposit may have been formed deep in the Earth, uplift, crust folding, or other geologic events can bring it to, or very near, the surface.

secondary deposits See alluvial deposits.
secondary market The secondhand market is considered anything that has been resold by an end user.

Secondary Deposits
Gemstones moved away from their original location by Mother Nature. Rain and erosion, glacier movement, and mudslides can all redeposit minerals miles from their original location.

Secondary deposits consist of gravel concentration in karst pockets and in alluvial fans in the Luc Yen valleys (Kane et al.. 1991). The gem-bearing valleys are often narrow, small depressions ranging from 0.5 to 0.

They are called secondary deposits because the gems are not found in the rock in which they formed or are hosted, but in deposits caused by the weathering and erosion of primary deposits. It includes the prospecting of riverbeds (i.e.

Placer diamond mining, also known as "sand-bank mining" (top of page, right) is used for extracting diamonds and minerals from alluvial, eluvial, and or colluvial secondary deposits, ...

The amber from the Samland Peninsula in the Baltic is actually a secondary deposit. The original amber forest was located further South.

Sapphires are formed in a syenite and pegmatite secondary deposits such as inthe alluvial deposits from the weathering of the parent rocks which is called byon. Sapphire grows in the form of a hexagonal bi-pyramid of twelve triangular faces.

Some of these diamonds made their way into streams, rivers and seas; however, these are only considered secondary deposits.

A sapphire found along Rock Creek, Dry Cottonwood Creek, and the Missouri River that are carried by flowing water and found as secondary deposits.

Morganite ...

See also: Color, Rough, Secondary deposits, Stone, Diamond