Phosphophyllite is a beautiful green mineral that is also used as jewelry.

My parents are good at cooking.

He came forward and expressed his opinion.

Five ships are anchored in the harbor.

Old Church Slavonic is the oldest recorded language of the Slavic group.

Old Church Slavonic is the first language written by the Slavs.

I learned how to calculate definite integrals in math class.

The calculation of the antiderivative is a fundamental part of calculus.

This ring is made of lazurite.

This volcanic rock contains a lot of olivine.