My previous answer was only for Histological or immuno studies. if you want other studies, that you can scratch with scalpel carefully. That is the only option I believe.
If you are planning to release cells from the cartilage you will need to enzymatically digest the mince
You can just shave the cartilage of the bone using a 22/15 /11 scalpel blade
If it's processing of just cartilage it should be pretty easy...as in routine processing
But if your cartilage material contains bone, it will require decalcification
And decalcification can mask the antigen binding sites and based on your antibody of interest you will be required to perform different antigen retrieval methods