This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
The Quarterly journal of the Geological Society of London . COLLECTED IN MADAGASCAR BY REV BAROtf yellow in colour Its crystals are remarkably well contoured they are bounded by faces out of the prismatic zone terminated by dome or hemipyramid Large pseudomorphs after hornblende occur sporadically They are crowded with minute