Small alien crystal

The small alien crystal is an miscellaneous item in the Fallout 3 add-on Mothership Zeta.

Characteristics
They are weightless, and have a value of 10 bottle caps. They have no other use besides as trade items, Rock-It Launcher ammunition, or as a house decoration.

Location
They are found aboard Mothership Zeta on some aliens, lying randomly tables or shelves where they are especially hidden among the alien artifacts the player cannot pick up.