If you want a stone held without prongs, the bezel is the answer: a metal wall forms directly around the gemstones girdle, securing it by pressure rather than points.
Stone Story
CZ isn't just colorless. Colored versions (sapphire blue, ruby red, emerald green, and most other gemstone colors) are produced by introducing metal oxide dopants during synthesis. The color is even, consistent, and repeatable.
Care & Keeping
Fine jewelry earring posts are manufactured to consistent gauge standards, which is what makes universal clutch back sizing viable. The internal grip of a standard clutch back is sized to accommodate that gauge range, and comfort backs use the same post gauge range with a larger grip body for heavier earring formats.