Watch as this unique swan shaped storm glass forms different crystal patterns that correspond to changing weather formations. A storm glass works on the premise that temperature and pressure affect solubility, sometimes resulting in clear liquid, causing precipitants to form. However, the method by which this works is not fully understood. Although it is well-established that temperature affects solubility, some studies have simultaneously observed several different storm glasses forming similar crystal patterns at different temperatures. In addition, sealed glasses are not exposed to atmospheric pressure changes and do not react to the pressure variations associated with weather systems.