This markstone indicates the boundaries of the ancient times.

This rock is mainly composed of albite.

Olivine is a major component of the Earth's mantle.

This meteorite contains olivine.

There are many sweet flags blooming in this pond.

This rare stone is something I found in the mountains.

A beautiful gemstone was embedded in her ring.

Her ring was adorned with a beautiful garnet.

Last night, a meteorite fell from the sky.

Realgar is a beautiful red mineral, but it is toxic.