A secondary deposit refers to gems found away from their primary source.

A secondary deposit refers to gems found away from their primary source.

• A. Gems found away from primary source
• B. Gems still in original rock
• C. Synthetic diamonds
• D. Industrial diamonds

Answer: (A)

Secondary deposits are where gems have been freed from their original rock and transported to a new location, creating accumulations away from the source. This concept helps explain why diamonds found in riverbeds or alluvial gravels are considered secondary deposits: the diamonds eroded from their primary host rock and were carried by water to a distant setting, where they settled. So, the statement fits because it describes gems located away from their primary source, which is exactly what a secondary deposit is. The other options don’t capture this idea: gems still in the original rock are primary deposits; synthetic diamonds are lab-made, not naturally deposited; and industrial diamonds refer to usage, not where the stones were deposited.

Secondary deposits are where gems have been freed from their original rock and transported to a new location, creating accumulations away from the source. This concept helps explain why diamonds found in riverbeds or alluvial gravels are considered secondary deposits: the diamonds eroded from their primary host rock and were carried by water to a distant setting, where they settled.

So, the statement fits because it describes gems located away from their primary source, which is exactly what a secondary deposit is. The other options don’t capture this idea: gems still in the original rock are primary deposits; synthetic diamonds are lab-made, not naturally deposited; and industrial diamonds refer to usage, not where the stones were deposited.