I'm not an expert on name seals, but for those who aren't familiar with "chops" or
name seals, i took a couple of photos -
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The 2nd from the top is my old one, but the others are new, recently
brought back from Seoul by my parents. These are made of either hardwoods
or semi-precious stone, but the sky's the limit if you want more expensive materials
and the work of a master seal maker.
These seals are still widely used in Asia for a variety of purposes.
I believe Chinese characters are typically used in Korea for official name seals.
user posted image
They also make a nice decoration for a letter or graphic art.
If anyone has more knowledge about this subject, please contribute.