Moon Bunny Series are inspired by a mythical figure-moon hare, who lives on the moon in Far Eastern folklore. We transform our fantasy about the moon into adorable features with sleek structural brass and spinning palely translucent moonstone. This design can’t be converted to clip-on. Full length measures approx 5.5cm Material: brass Quartz/ Ore: moonstone (gemstone) Studs are made of anti-allergic stainless steel, but not for those who can only wear fine gold or fine silver material. Brass is easy to care for, use a dry scouring pad/ silver polishing cloth or nail polish cube to rub off oxidation from the surface. You can also use brass polish with dry cloth to polish it.