STORY: The storm glass or chemical weather glass was an instrument which was proposed as a method for predicting weather. It consisted of a special liquid placed inside a sealed transparent glass. The state of crystallization within the liquid was believed to be related to the weather. This device became popular in the 17th century after being promoted by Admiral Robert FitzRoy FEATURES: Enjoy morphing crystals in various patterns based on the weather forecast DIY wooden base engraving! A centerpiece for everyone to experience! Great for gifts all of occasions!