Ruby and garnet on biotite 5 cm

This stone features ruby and garnet crystals embedded in a biotite matrix. Rubies are renowned for their deep red color, primarily due to traces of chromium, while garnets typically come in shades of red to violet. Biotite, a dark brown or black mineral, belongs to the mica family and often serves as a host mineral in this type of formation. These stones are commonly mined in Asia, particularly Sri Lanka and India, and in Africa. This type of assemblage can form under high temperatures.

The size of this stone is approximately 5 cm.