New! Original Necklace: SS/14K - Garnet / plus Garnet in Shist1. 9" H x . 7" W Garnet in Schist is the same rock as a mica schist with the exception of the inclusion of the garnets (too cool!). The original rock type is typically a clayey rock with some calcite content such as a siltstone or a mudstone. The major minerals in a schist are quartz and mica. Garnet is the name used to describe a large group of silicate, rock forming minerals. Each species of garnet have similar physical properties and are similar in