Post length must be matched to the wearer's earlobe thickness. A post too short won't accommodate the back securely, while an excessively long post extends visibly behind the ear and compromises both security and comfort.
Made With Purpose
Studs come in prong, bezel, flush, pave, and halo settings, and the differences are not subtle. Prong settings show the stone from the sides. Bezel wraps it. Flush sinks it level with the metal. Pave adds sparkle across the face. Halo makes the center stone look larger.
Stone Story
It's important to keep the shade of aquamarine in mind when you're giving it as a gift. Ranging in color from pale sky blue to the rare, intensely saturated blue of Santa Maria material, knowing where on the spectrum you're buying is the key quality distinction. Deeper saturation tends to command greater value.