Antofagastaite    
 
From : Coronel Manuel Rodriguez mine, Mejillones, Chile
 
White to colourless tabular crystals of the rare sodium-calcium-sulfate Antofagastaite in beautiful 
paragenesis with yellow Sideronatrite crystals and blue Kröhnkite. Antofagastaite was IMA-approved in 2018 and only two localities are known so far. This specimen is from the typelocality. 
 
Dimensions : 3.5 x 2 x 1.3 cm