A ‘tw’ designation, when applied to diamonds, indicates the total weight of diamonds present within a piece of jewelry. For example, if a ring contains multiple diamonds and is marked ‘1.00 tw,’ it signifies that the combined weight of all the diamonds in the ring totals one carat. This contrasts with a single-stone carat weight, which refers to the weight of a solitary diamond.
Understanding this measurement is crucial for accurately assessing the value and appearance of diamond jewelry. It allows consumers to understand the overall quantity of diamonds present. Historically, this form of weight assessment has become standard to ensure clarity and transparency in jewelry sales, enabling informed purchasing decisions based on total diamond content.