Co-finishing surfaces

A method for co-finishing surfaces, comprising:

• adhesively bonding a sapphire window to a zirconia structure such that a combined surface formed by a first surface of the sapphire window and a second surface of the zirconia structure is uneven;
• placing a fill material in a gap between the sapphire window and the zirconia structure;
• and
• co-finishing the sapphire window and the zirconia structure, thereby:
• removing a chamfered edge of the sapphire window;
• making the combined surface even;
• and
• conforming a first geometry of the first surface to a second geometry of the second surface.

A method for co-finishing surfaces, comprising:

• providing a first material having a first surface with an aperture defined therein;
• attaching, to the first material and in the aperture, a second material having a second surface and a chamfered edge adjacent the second surface, the second material positioned relative to the first material such that the first and second surfaces are non-contiguous;
• and
• co-finishing the first material and the second material to make the first and second surfaces contiguous and to remove the chamfered edge;
• wherein
• at least one of the first and second surfaces is non-planar.