Which term describes gems found in the rock that carried them to the surface?

Which term describes gems found in the rock that carried them to the surface?

• A. Reflection
• B. Recutting
• C. Primary deposit
• D. Proportions

Answer: (C)

The question tests understanding of primary versus secondary diamond deposits. When diamonds are still within the rock that carried them to the surface, that situation is called a primary deposit. Here the gem is embedded in the host rock and found at the source, not moved elsewhere. If diamonds were transported away from their original rock and deposited elsewhere by water or other forces, that would be a secondary (alluvial) deposit. So describing gems found in the rock that carried them to the surface points to a primary deposit. The other terms don’t fit: reflection relates to how light interacts with a gem, recutting is about changing the cut, and proportions refer to facet measurements, not how diamonds occur in rocks.

The question tests understanding of primary versus secondary diamond deposits. When diamonds are still within the rock that carried them to the surface, that situation is called a primary deposit. Here the gem is embedded in the host rock and found at the source, not moved elsewhere. If diamonds were transported away from their original rock and deposited elsewhere by water or other forces, that would be a secondary (alluvial) deposit. So describing gems found in the rock that carried them to the surface points to a primary deposit. The other terms don’t fit: reflection relates to how light interacts with a gem, recutting is about changing the cut, and proportions refer to facet measurements, not how diamonds occur in rocks.