Square spiral stud earrings with a minimalist, tribal look -- made from Niobium so hypoallergenic for sensitive ears. COLORS: Gold, Silver, Peacock, Green, Light Blue, Teal, Copper and Violet GAUGE: you can choose 18 or 20 gauge wire thickness. 18 gauge is thicker than 20 gauge and holds its shape better. However, 18 gauge may be too thick for teens or newly pierced ears so if this case with you, please get 20 gauge. WHAT IS NIOBIUM?: Niobium has got to be my favorite metal -- not only because of its cool name, but also because it is element #41 on the periodic table! That means unlike silver or gold, Niobium is not mixed with ANY OTHER METAL -- it's ALL Niobium! This is why it is the best metal to use for sensitive skin. It is colored by 'painting' the metal with electricity and the voltage amount controls the color. SHIPPING: Earrings are shipped inside a cotton filled box (all ready for gift giving) and the box inside a bubble package. IMPORTANT: Earrings are created by hand just for your order, so they may not look EXACTLY like the picture.