Chalcedony Chunk!

This rock looks like it could be a type of chalcedony, specifically a variety known as carnelian or possibly agate. Carnelian is known for its rich, warm colors ranging from orange to reddish-brown, which seems to match the coloration of the rock shown. Agate, on the other hand, often has banding or layers, which might be present here but is less distinct. Both are forms of silica and are commonly polished for decorative purposes due to their attractive appearance.