Interesting minerals of charoite rocks

We all know that the patterned textures in decorative charoitites are very diverse and can sometimes reproduce landscapes, individual figures, and even faces. However, we want to talk not about the patterned varieties of this decorative rock, but about the minerals found in it, which are embodied in their names by the names of prominent scientists, geologists, mineralogists and simply connoisseurs and lovers of stone. The first mineral is aggrellite. The mineral found in the charoitite as an accessory, but nevertheless, on an equal footing with other charoitite minerals, reflects the entire mineral wealth of this extraordinary rock. The mineral agrellite was named in 1973 after the English mineralogist Stuart Olof Agrell (1913-1996), and the first information about it was published in the Canadian Mineralogist magazine in 1976 by John Gittins, Michael Bone ( Michael G. Bown and Bozidar Darko Sturman (1937-2019). Stuart Agrell is famous for being co-founded by Jim W.P. Long (Jim V.P. Long, 1926-2003) in 1949 began to use an electron microscope for mineralogical and petrological research. Another field that brought Stuart Agrell worldwide fame was the study of meteorite mineralogy. In 1949 he began to study the mineralogy of meteorites on the basis of the collection of the University of Cambridge. As a result, he devoted his entire life to the problems of meteorite mineralogy, moreover, becoming the only non-American researcher of lunar rock samples collected as a result of the Appolo program. The mineral aggrellite belongs to the class of inosilicates (chain and tape silicates) and has the chemical formula - NaCa2 (Si4O10) F.