In which type of rock are gems formed from pegmatite typically found?

Gems that form from pegmatite are found in igneous rock, and this connection is essential to understanding gem formation. Pegmatite is a coarse-grained igneous rock that crystallizes from molten magma, typically under conditions that allow for the growth of large crystals. The unique chemical composition and cooling rate of pegmatite contribute to the formation of certain gemstones, which can be larger and more colorful due to the presence of various minerals.

The conditions in pegmatitic environments promote the crystallization of rare minerals, leading to the formation of popular gems such as tourmaline, beryl (which includes emerald and aquamarine), and garnets. The restricted environment within these igneous formations allows for the growth of these beautiful and often valuable stones in a more concentrated manner compared to other types of rocks.

Understanding the geological processes behind pegmatites reinforces the importance of igneous rocks in the study of gems, and highlights why those specific gem formations are directly tied to this rock type.