"Euglena live"

Nearly pure, green crystalline forsterite.

When minerals, rocks, and fossils cannot be accurately identified by macroscopic observation and testing, thin section slides can reveal the composition and structure of the specimens on a microscopic level.

Fine crystalline, pure calcite.

Fine to medium-grained with biotite.

Dark, coarse-grained, and composed chiefly of hornblende.

White and black bands of quartz, feldspar, and biotite; typical foliation.

Formalin Preserved