This rock was formed through the process of silicification.

This fossil has been silicified over millions of years.

He won a million yen in the lottery.

This year was a very busy year.

I find my new fountain pen easy to write with, and I really like it.

Silicon is one of the most abundant elements in the Earth's crust.

Silicon is a major component of semiconductors.

We enjoy picnicking in this park year-round.

I like finding fossils.

This tree has fossilized over thousands of years.