Antique Vintage Billiards Cue Ball Unsure Of Material Crackling All Over

Description

Definitely an old cue ball based on the crackling
Unsure Of Material
Could be bone but hopefully you can tell by the pictures if you're an expert
Don't have the best way to measure these but these are the approximates:
Circumference of all is approximately 7 in
Diameter of ball is approximately 2.5 in
Weighs approx 5.5 oz