Thanks for all your useful remarks. here is an article by Ioanna Symeonidou of 2016: "Anamorphic Experiences in 3D Space: Shadows, Projections and Other Optical Illusions" that inspired me a lot. There seems to be an endless variety of anamorphic objects and Mathematica surely can help one explore them all!

Hi Fredrick, I don't have any jewelry, nor any reason to give jewelry away.

Though I do like ambigrams, so I made one for my friends in Asia.

The English title of this work is "OLED is Purest RGB, you understand?":

VoxData =   ImportVox["https://0x0.st/-hhx.txt"];
Graphics3D[VoxData, Boxed -> False]
GraphicsGrid[Transpose[Partition[MapThread[Show[Graphics3D[VoxData],
      Boxed -> False, ViewProjection -> "Orthographic", 
      ViewPoint -> #1, ViewVertical -> #2] &,
    {{{0, 1, 0}, {0, -1, 0}, {0, 0, 1}, {0, 0, -1}, {1, 0, 0}, {-1, 0, 0}},
     {{0, 0, -1}, {0, 0, -1}, {-1, 0, 0}, {-1, 0, 0}, {0, -1, 0}, {0, -1, 0}}}], 2]]]

Surprised this experiment worked so well. It's worth further exploration to see if there is possibly a theorem hiding in there. Have to sleep for now... It's late US time.

Cool idea, nice post! Coincidentally @Frederick Wu also recently posted about ring jewelry. As he is the practicing jewelry craftsman he might find this interesting for the future applications. Thank you Erik!