The basis for building the whole NDS as EDUCATION version was METAMORPHIC ROCK – commonly known as SLATE (nor. Skiffer) On the other hand, the exchangeable specimen with the possibility of unscrewing and exchange for another one is a redish granite and white quartz with beautiful PYRITE with small GOLD veins from gold main in northern Norway

SPECIMEN  :                                             Pyrite

ORIGIN :                                                    Norway

SPECIMEN DIMENSION ( mm ) :          32 x 17 x 26

SPECIMEN WEIGHT ( g ) :                     23                 

NDS DIMENSION ( cm ) L x W x H :     20 x 16 x 12

TOTAL WEIGHT NDS ( kg ) :                 1,6

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