Card Holder: Shuffled small squares, tones of grey go to clear

Card Holder: Shuffled small squares, tones of grey go to clearView custom 'Card Holder' in store, or more details, options, similar.
About the stamp:
Image with overlapping mini squares in tones of gray and some whitish or clear grey. The image can cause 3d illusion and something like small labyrinths or small tiling/stones.
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