In the beginning of every month, I publish a bunch of new riddles - 4-5 every time, as it's supposed to be one per week. Every riddle has been constructed and tested by me, but still I won't guarantee that they "work". Never mind, go ahead and try!
During the last 10 years, 4 new minerals have been discovered in the remote Egewe desert. The mineral, which was discovered by Sir Owens, has a tetragonal crystal structure and is now used in the electronics industry. The mineral, which can be used in paint, has an orthorhombic crystal structure and it's a bright yellow. Bagite has a cubic crystal structure. Kalanchite is usually just used for display in museums and is rather pink. The mineral discovered by professor Alitschuk is white if and only if the mineral discovered by Dr. Dellaire has a tricline crystal structure. The mineral discovered by professor Alitschuk is not the one, which is usually just used for display in museums; it really can be used in some way. The blue mineral is used for jewellery if and only if Maursite has a tricline crystal structure. Sir Owens discovered Raysinite, and Maursite was discovered by Dr. Martin.
Who discovered Kalanchite?
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