border-radius seems to be applying on iOS fine, but on android you can see that it's behind the image itself and not applying to the image

Using the following CSS:

.header-image{
  margin: 15px 0 0 15px;
  border-radius: 30;
  border-color: gray;
  border-width: 0.5;
  height:60;
  width:60;
}

Produces (iOS):

and produces (android):

Note that you can see a couple of pixels to the left of the image, which I assume is the border-radius.