Volcanoes are powerfully destructive, yet they can produce a very beautiful type of rock. It is called an agate, and has great diversity of colour, shape and form. Let's take a journey from the volcano to the polished gem stone and see if God has any precious lessons for us to discover.

Dad and Emmanuel fossicking for agates.

Most agates are formed in air bubbles in volcanic lava. Super-hot silica can flow into these air cavities, wholly or partially filling them. This silica flow forms beautiful bands of colour as it swirls around and then cools...