I bought this one just for the attractive green and blue patina
Diocletian
A.D. 295-6
28mm 7.8g
IMP C C VAL DIOCLETIANVS P F AVG; laureate head right
GENIO POPVLI ROMANI; Genius standing left, naked but for chlamys over left shoulder & modius on head, with patera from which liquor flows
In ex. KS
RIC VI Cyzicus 12a