In an opulent, galleried mansion, restored to its former Victorian glamour, the museum displays and sells the Dominican Republic's national stone: semiprecious, translucent amber. Amber is essentially prehistoric hardened tree sap, and Dominican amber is considered the best in the world. Many pieces are fascinating for what they have trapped inside, and the second-floor museum contains a piece with a lizard reported to be 50 million years old, give or take a few millennia. The museum's English text is informative. Shops on the museum's first floor sell amber, souvenirs, and ceramics.