Spherical phosphorite, like this, is fount as a mineral concretion and separated from the formation in which it occurs. Our specimen (diam. 14cm) is put on a black wooden base ( 14 x 14 x 5cm) and has a label from the ‘staatrealschule wien’ underneath. It was found in 1900 in podoline and it used to be part of the school’s chemical collection under nr. 164.

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