All our rocks are carefully selected for educational study. They come in labelled trays. The trays are normally 3″ x 2″ size depending on the rarity of the specimen. Average specimen size is shown below. These are ideal for classroom teaching and are a size that can be easily passed round the classroom for students to get a feel for each type.
Mica schist is a medium grained metamorphic rock which is well known for its platy foliated crystals in a single orientation and its reflective appearance. The rock is often composed of at least 50% or more platy, elongated schist crystals, however, quartz and feldspar can also be present and sometimes garnets.