Volutin granules are cytoplasmic inclusions of complexed inorganic polyphosphate. This protein accumulation forms proteinaceous cytoplasmic inclusions called Lewy bodies. Chondrites are undifferentiated and have round mineral inclusions called chondrules. They are silicate glasses with inclusions of other materials present within them. Voids typically coalesce around precipitates, secondary phases, inclusions, and at grain boundaries in the material. Those atoms can aggregate into macroscopic phases called inclusions. Carnallite may be red as a result of hematite (FeO) inclusions. Emeralds tend to have numerous inclusions and surface-breaking fissures. They frequently contain bubbles and lechatelierite inclusions. Tau proteins have been found in some glial cytoplasmic inclusions (GCI)s. Gems lacking the silky inclusions required to produce the cat's eye effect are usually faceted. The type of crystal was determined by examination of chlorite inclusions. Fairyflies are well represented in fossil amber inclusions, copal, and compression fossils. Furthermore, most inks were highly corrosive and full of sedimentary inclusions. Sorby (1858) was the first to document microscopic melt inclusions in crystals.