What is the definition of a 'point' in gemology?

In gemology, a "point" is specifically defined as a unit that is equivalent to one hundredth of a carat. This means that one carat is divided into 100 points, so a gemstone weighing 50 points would be classified as 0.50 carats. The use of points allows for a more precise expression of smaller weights, which is particularly important when dealing with gemstones that are less than one carat. This unit of measurement is widely used in the jewelry industry, helping to standardize the pricing and valuation of gemstones according to their size.

The other options present concepts that are relevant to gemology but do not accurately define a "point." Cutting techniques refer to the skill and method used to shape a gemstone, inclusions refer to the internal characteristics that can affect a stone’s clarity, and a measurement system for gem quality encompasses various grading factors but does not specifically pertain to the definition of a point. The clarity of the definition of a "point" distinguishes it as a fundamental concept in measuring gemstone weight.