When you look at a jade hairpin, the first thing to check is tone. Good jade has a warm, even color rather than a harsh green or a washed-out white. Hold it to the light: you should see a soft translucency, not a cloudy opacity.
Next is profile. A hairpin that looks dramatic on a stand can feel heavy or bulky in the hair. The silhouette, thickness, and stem length all change how it sits during the day. If you wear your hair up often, a slimmer profile is usually more comfortable.
Finally, check the setting. Plated metal can wear over time, while silver settings feel cooler and heavier. If you plan to wear the piece for ceremonies, consider how it photographs and how it catches candlelight.