shiny

A jelly bean takes anywhere from 7 to 21 days to make. It starts with liquid sugar and flavors being heated and mixed with starch and glucose. More sugar is added to give it a hard shell plus hot syrup and wax are applied to give it a shiny finish – all over the course of many days of processing. – WTF Fun Facts

Source: https://www.rd.com/food/fun/jelly-beans-facts/