It's often called septarian agate or septarian jasper. However, it is neither. Both agate and jasper are minerals; septarian is a rock. Other names for septarian rock include concretion, septoria, dragon stone, and septarian egg or dragon egg.
Soo yes indeed, I had to get it especially carve into ofcourse a DRAGON HEAD!! Weighing at 1.850kg
And Septarian are UV activated!!
Approx Measurements
Back to Nose; 18.5cm
Thick; 8.5cm