Johann Reinhard Blum

Johann Reinhard Blum (28 October 1802, Hanau – 21 August 1883, Heidelberg) was a German mineralogist.

From 1821 he studied at the universities of Heidelberg and Marburg, receiving his habilitation for mineralogy in 1828.

[2] In 1871 he was a founding member of the Oberrheinischen Geologischen Vereins (Upper Rhine Geological Association).

[3] He is best remembered for his pioneer research of pseudomorphs, and was the author of a landmark textbook on the subject, titled "Die Pseudomorphosen des Mineralreichs" (1843).

[4] With chemist Friedrich Wilhelm Hermann Delffs, he described leonhardite, a name given for a partially dehydrated, opaque laumontite.