Which term describes a random sample taken from a parcel of gemstones to assess overall quality?

The correct term that describes a random sample taken from a parcel of gemstones to assess overall quality is "Pick." In the context of gemstone evaluation, a "pick" refers to a selection of stones chosen to represent the larger group or lot from which they were drawn. This method is commonly used in the gemstone industry to gauge the quality of a collection based on a subset rather than evaluating each individual stone, which can be time-consuming and impractical.

In this scenario, assessing the quality of the entire parcel based on a smaller, representative sample can give buyers and sellers a better understanding of what to expect in terms of quality, color, clarity, and other important factors when dealing with gemstones. The concept of "picking" stones helps to streamline the evaluation process, enabling quicker decision-making based on this smaller representation.