Here we have an interesting specimen of rare sulfosalt Heyrovskyite from the Czech TYPE LOCALITY Hůrky of Čistá at Rakovník District, Bohemia. We see several gray metallic grains embedded in Quartz rich matrix. Hůrky is an area of ca. 800 x 200 m contains a series of veins of cancrinite-nepheline syenite enveloped by fenites, which involve alteration of both the granodiorite and granite. Rare material, hard to come by.