Fine jewelry posts are produced in a consistent standard gauge, which means a universally sized replacement clutch back from a jewelry counter will fit virtually all of them.
Made With Purpose
The friction back is the earring back that most people are familiar with. It has two spring-tension wings on a small metal body, pressed onto the post, holding everything in place through grip alone.
Stone Story
A sapphire's color is evaluated across three variables: hue, tone, and saturation. The most valuable stones show strong, even saturation without cloudiness or color concentration in one area.