idiomite

Idiomite is a rare dense rock form composed primarily of idiomorphic crystals. It is characterized by the presence of distinct crystal shapes and the absence of interstitial matrix material. Idiomite is typically found in areas where igneous or metamorphic rocks have been subjected to high pressure and temperature conditions.

The term idiomite was first used in the mid-19th century to describe this specific type of rock. The name is derived from the Greek words "idio," meaning separate or uncombined, and "mite," a suffix used to form names of minerals or rocks. The exact composition of idiomite varies but often includes minerals such as feldspar, quartz, and mica.

Idiomite forms through a process called recrystallization, where individual minerals in the original rock undergo changes in their crystal structure in response to increased pressure and temperature. This process can result in the characteristic idiomorphic crystal shapes and clear boundaries between individual minerals seen in idiomite samples.

Idiomite is not typically used as a building material or for any industrial purpose due to its rarity and the challenges involved in extracting and processing small quantities of this rock. However, it is of interest to geologists and collectors due to its unique composition and formation process. Its relative rarity and limited accessibility also contribute to its value in the scientific community.