One of the American Museum of Natural History's most popular exhibits is finally reopening after years of being closed for renovations.

The Mignone Halls of Gems and Minerals dazzles with more than 5,000 gems and minerals from 98 countries.

The main attractions include a fluorescent rock that glows in the dark, and two giant amethyst geodes that formed millions of years ago.

"What it is supposed to do is give you an idea of what minerals are, what they look like, and what their role is on the planet," says George Harlow, the exhibit's curator.

He says the hall is part of the museum's education program through which students and instructors can come to learn more about the thousands of specimens.

The exhibit features interactive installations and videos throughout the hall to assist in education.