There are several methods to determine if sodalite is real, including the following:
Visual inspection: Real sodalite should have a rich blue sodalite color with white veining. If the stone has a pale or washed-out color, it may not be genuine.
Specific gravity test: Sodalite has a specific gravity of 2.3-2.4. This can be measured using a gemological scale.
UV light test: Real sodalite should fluoresce a blue-white color under long-wave ultraviolet light.
Acid test: Real sodalite is insoluble in acid. To test, you can apply a drop of hydrochloric acid to the stone. If it dissolves, the stone is not genuine.
Expert appraisal: A gemologist or other trained professional can examine the stone and use a combination of tests to determine if it is real.