A scab
Prolonged exposure to high blood sugar causes the veins to harden.
It is called Lava
Sclerotherapy is a treatment of injecting a solution to harden the veins.
Bones that are filled with liquid minerals that later harden are called trabecular or spongy bone. These bones have a lattice-like structure that is filled with bone marrow and blood vessels to support bone growth and repair. As the liquid minerals in the bone marrow harden, they give strength and structure to the bone.
The blood cells join together till they form a wall. Then they harden and become a scab.
permineralization
They contain a substance called hardener.
Alcohol reduces the risk that your arteries will harden and that they will become clogged with plaque.
It is called a magmatic intrusion.
permineralization
Molten rock is magma. It is called lava once it has cooled and hardened.
It is called arteriosclerosis, or atherosclerosis.