But the one upthread may be from this post "A 2,000 year old Roman rock-crystal 20-sided dice. Possibly used in fortune telling, the Greek letter on each face may have corresponded to a reference in a divination handbook. Alternatively, it was used for an unknown game."
There's a similar one in the Louvre
"1cm high rock crystal playing dice from the Roman Empire"
https://nitter.nl/MuseeLouvre/status/716194283913613312
But the one upthread may be from this post
"A 2,000 year old Roman rock-crystal 20-sided dice. Possibly used in fortune telling, the Greek letter on each face may have corresponded to a reference in a divination handbook. Alternatively, it was used for an unknown game."
https://nitter.net/TheClassicalCo/status/1523621516898095105
@lucifargundam @benjancewicz