X marks the spot!

Based on the image, the rock appears to have a banded or layered structure with a mix of colors, including white, yellow, and some darker inclusions. This pattern and coloration are characteristic of certain types of jasper or agate.
Jasper: Often found in red, yellow, brown, or green colors, it's an opaque variety of chalcedony. The yellow and white bands in your rock might suggest a type of yellow jasper or a similar variety.
Agate: Known for its banding, agate can come in a variety of colors, but the distinct layering seen in your rock could indicate a type of agate with iron oxide inclusions giving it the yellow hues.