Math rocks! Chemistry rocks! Science rocks! This set of enamel brooch is made of black and gold, and the pattern combines mathematical and chemical elements. 4-in-1, all for Science-lovers: Irrational number , Clock of metal elements, Chemical expression of methyl salicylate, Science, its like magic but real."Material: high-standard zinc alloy can be used continuously, quality enamel is not easy to fade or scratched. The butterfly clasp design on the backside of the pins makes it easier to wear and remove.We will give you extra butterfly clasps in the package.Applicable occasions: Daily Outlook, DIY making, Collect badges, Parties, Celebrations, Balls or Galas.It can be a thoughtful gift for special occasions like: Birthday, Christmas, Rewards, Childrens Day, Womens Day or other anniversaries/festivals for your family, friends or yourself. Matching clothes, jackets, suits, backpacks, hats and bags can increase the outlook.ROFARSO Brooch Pins is committed to provide high-quality brooch pin products, novel fashion accessories and comfortable online shopping experience. Ourdesign, materials and craftsmanship are constantly experimenting and innovating.Your feedback is our motivation to improve. ROFARSO Brooch Pins can be your best choice for brooch selection.