Päevakivid

Päevakivid, also known as diorite, are a type of intrusive igneous rock that is characterized by its light color and the presence of feldspar and quartz. They are formed from the slow cooling of magma beneath the Earth's surface, which allows for the growth of large crystals. Diorite is typically composed of about 20-60% quartz, 20-60% plagioclase feldspar, and 10-50% hornblende or biotite. The term "päevakivid" is derived from the Estonian words "päev" meaning day and "kivid" meaning stones, reflecting the rock's light color and the fact that it is often used as a building material.

Diorite is commonly used in construction and as a decorative stone due to its durability and attractive appearance. It is also used in the production of crushed stone for road construction and as an aggregate in concrete. The rock is found in various locations around the world, including the United States, Canada, and Europe. In Estonia, päevakivid is a significant component of the local geology and has been used for centuries in the construction of buildings and other structures.

Despite its usefulness, diorite can be challenging to work with due to its hardness and the presence of large crystals. Specialized equipment and techniques are often required for cutting and shaping the rock. Additionally, the presence of quartz in diorite can make it more susceptible to weathering and erosion over time. Despite these challenges, päevakivid remains an important resource in many parts of the world, particularly in regions where it is abundant and easily accessible.