The angiosperms include many plant families. The most common one in the Petrified Forest are the laurels (Lauraceae) and the beech (Fragaceae) which belong to the dicotyledons. Many types of laurels and cinnamon belong to the laurel family, while species of oak, chestnut and beech belong to the beech family.

The collection includes impressive silicate minerals in a wide variety of forms such as quartz, prasiolite, amethyst, rock crystal, smoky quartz, chalcedony, rose quartz.

The museum has a rich collection of minerals and rocks from Greece and abroad, which is constantly enriched.

The collection includes plant fossils from fossil-bearing sites from all over Greece that belong to a wide variety of plants and provide us with a picture of vegetation and climate change through various time periods over the last 30 million years.

The collection includes the fossils that came to light from the systematic research of the Museum in the sea area of ​​Western Lesvos, which began in 2001. They are impressive fossilized tree trunks that belong mainly to conifers, found at a depth of 4-5 m.