Great looking animal! I have a female almost identical to this one that produced a clutch of het hypos for me this year.. however, the babies only remotely looks like granites... if it's genetic, it doesn't appear to be dom/co-dom... to my disapointment I haven't sexed the clutch yet, but I may hold a male back to breed back to mom, just in case...

*edit* yours is more extreme than mine though... better odds yours will be genetic than mine I'd say...

Good luck and keep us posted!

Regards,
Bristen.