Benitoite instead of apatite

Abstract

This amendment is made by me to the note “An interesting crystal of apatite, a satellite of neptunite from California.” (Notes of G.I. II 253) based on the written instructions of Dr. Slavik from Prague, who noticed my error based on the data from my own description, mainly pleochroism. Having tested the hardness, which turned out to be slightly higher than thsat of orthoclase, I can now declare the error that occurred with full conviction.