What unique feature does an invisible setting have?

The unique feature of an invisible setting is that it has a channel cut on the underside of the gem. This design allows the stones to be securely placed next to each other without the need for metal prongs or visible settings, creating a seamless appearance. The channel cut serves as a guiding mechanism that holds each gem in place while maintaining an elegant and uninterrupted surface. This technique is particularly valued in high-end jewelry design for its aesthetic appeal, giving the illusion that the gems are floating or held together solely by their edges.

Options that mention using glue or specifying types of gemstones do not accurately describe the defining characteristics of an invisible setting. Additionally, the notion that larger gemstones are required for stability contradicts the inherent design of the invisible setting, which often accommodates a variety of stone sizes arranged in a way that ensures they are securely held in place without reliance on individual stone's size.