Which term refers to a set of circular plates used for sorting small gems by size?

Which term refers to a set of circular plates used for sorting small gems by size?

• A. Separation
• B. Sight
• C. Sieve Set
• D. Shape

Answer: (C)

Sorting small gems by size is done with a sieve set—a stack of circular sieves, each with a different opening size. By shaking or tapping, stones that fit through a given opening pass to the next plate, while larger stones stay on top, creating discrete size classes. This term uniquely identifies the tool and the method of size grading. Separation is a general idea of dividing materials, sight isn’t a relevant term here, and shape refers to form, not the size-sorting technique.

Sorting small gems by size is done with a sieve set—a stack of circular sieves, each with a different opening size. By shaking or tapping, stones that fit through a given opening pass to the next plate, while larger stones stay on top, creating discrete size classes. This term uniquely identifies the tool and the method of size grading. Separation is a general idea of dividing materials, sight isn’t a relevant term here, and shape refers to form, not the size-sorting technique.