What is llanite?

Llanite is a rare igneous rock that is composed primarily of blue quartz, orthoclase feldspar, and biotite mica. It is named after Llano County, Texas, where it was first discovered. Llanite typically has a striking blue color due to the presence of quartz with blue inclusions.

Llanite is believed to have formed around 1.1 billion years ago during the Precambrian era. It is found in relatively small quantities in only a few locations around the world, with the main deposit being in Llano County, Texas.

Llanite is considered a rare and collectible rock due to its unique composition and striking appearance. It is often used in jewelry and lapidary work, as well as in decorative and ornamental applications.