"American Cornelian" was MFCs name for their Oxblood Bricks, I think. Here are a couple of HG Akros that are more like yours. I think the one on the left is closest to a Cornelian Brick and some people refer to the right one as a Mulberry Brick, I think Cornelian Brick, Mulberry Brick, etc. were digger's names for marbles that looked a lot like oxblood but weren't.