![]() | May/June 2010: In This Issue Cristalli: The Adalberto Giazotto Collection In more than fifty years of continued activity, Dr. Adalberto Giazotto has assembled one of the major world-class collections of large and well-crystallized mineral specimens. Illinois Mineral Locality Index The bedrock under Illinois is predominantly composed of Paleozoic sedimentary rocks. In the southern portion of the state, these rocks were deposited in a northwest-to-southeast spoon-shaped basin. | |

