While perusing some interesting coins, a question came to me: When a TPG grades a coin with an unconventional surface, do they ignore the non-metallic part(s) of the surface? I mean, if a coin is made of metal plus something else, how do they regard that "something else?" How do the non-metallic elements of a coin come into play in the TPGs' assessment? Here are some examples of the coins I'm talking about. None of them are mine. Here's Palau's annual "OUNCE OF LUCK" coin. Do the TPGs ignore the condition of the real 4-leaf clover? And here's Fiji's Seashell coin. Surely, the UCAM or DCAM designation does not apply to the faux shell side. Is that side ignored? This next example is my favorite series. It's POWER COIN's Great Micro Mosaic Passions series, which focuses on famous artworks. For this one, there are 7,000 micro tiles. Again, do the TPGs ignore the entire tiled side? Next is Palau's Forbidden City $20 piece. Here, there's a stone in the center. Precious stones are graded differently. Again, would the MS70 grade exclude the grade of the stone? Finally, from Palau's SACRED ART WINDOWS series, here's one featuring Notre Dame Cathedral (minted and issued before the fire). So here again, I assume the art glass in the center would not come into play in the TPGs' evaluation? Just curious about the treatment of these coins with unconventional surfaces. And there are so many more. If you know, please share. If not, I hope you enjoyed the photos and have a great weekend!