Pluto was once the 9th planet in our solar system, until 2006, when it was reclassified as a dwarf planet. The PL symbol is a monogram of the first two letters of the planet and the initials of Percival Lowell, the man who formed the beginning of the effort that led to the discovery of Pluto in 1930.
The black background is made of black enamel and the rest of the pendant is made of 925 sterling silver. There is a 925 sterling silver chain included with this item.
Diameter: 2.4 cm (0.9 in)