You'll receive 3 of the chunks from the photo, these are all very dark green with a few tiny red dots on each one, the specks are often small but they are there if you look!
They sometimes have some orangey iron marks too as shows in the photos.
These are perfect for a grid around a room or a house, or for a layout around a bed or a person.
On average these rough chunks measure about 2cm x 2cm, some are slightly bigger some are slightly smaller.