You have to be very careful. These
Roman dice are very frequently faked.
At a recent militaria show I saw a "dealer" who
had 90%
fake coins. As I was examining the
fakes - it is always
good to look at and
handle these things - I saw him pull out a plastic bag FULL of
fake dice. A huge bag. I would have easily displaced a litre or two. There must have been several hundred dice in it.
Frankly I have serious concerns about your dice. The colouring is unnatural and unlike anything I have seen in any museum.
The fabrication is too perfect. Genuine dice were hand made, or at least using simple
tools - such as the drill-bow rig used to make the dot-and-eyes. Modern
fakes are made using machine
tools like belt sanders and band saws, though they can then be rasped with a file by hand to try to give them a genuine look.
And, mostly importantly, they lack the proper aging of genuine bone articles. Bone (and horn and ivory) also ages and develops a "
patina". It is hard to describe and best learned from examining genuine pieces. Surfaces usually have a mix of very glossy smoothness, rough parts and cracks. Many cracks are
very fine but go quite deep. the staining is uneven and follows the cracks and rougher portions.
Shawn