What does the term calibrated sizes refer to?

The term calibrated sizes refers to gemstones that have been cut to specific dimensions that align with standard mounting sizes. This practice ensures that stones can be easily set into jewelry without the need for additional modifications, allowing for a consistent fit across various settings or designs. Calibrated sizes are typically established for common shapes and measurements, making it easier for jewelers to source and work with these gemstones, as they are designed to match popular mounting styles.

In this context, while there are many ways gemstones can be cut or displayed, the focus on calibrated sizes specifically deals with the intersection of size and usability in jewelry settings, differentiating it from other options like gemstone cuts or light characteristics.