This spear head was originally printed for use in the shown Athena cosplay.
though printed in Gold, for a more antique look I treated it as described in the post-printing part.
21mm hole fits for 2cm rods.
split in half for ease of printing.
also included a vertical split for small printers, which will take longer to print. I did not test this but it should work fine.
added half version without a hole to use as a decoration as seen on the shield in the picture. The "diamonds" around the rim of the shield are also included.