Cook your Bones:

"At approximately 1292 degrees Fahrenheit, calcium phosphates begin to fuse together and change in color and shape. While not entirely reduced to ash, modern cremation does an excellent job of vaporizing and deteriorating bone.

Human bones are comprised of a collagen-rich matrix pregnant with calcium phosphate and other minerals. Calcium phosphates are inorganic mineral salts present in the form of tiny crystals, and make up roughly 65 percent of our bone mass.

Most tissue composing the human body begins combustion at 572 F. In cremation, the deceased is exposed to several hours of intense heat ranging between 1400 F and 1800 F, vaporizing all organic matter.

Some portions of the inorganic bone do survive this process, only as chips and re-fused fragments of calcium phosphate. In modern crematories this remaining material is sifted through a specialized processor and ground into a uniform substance similar to powder. This powder constitutes the remains of a body and is primarily cremated bone.""
Bones
After the cremation, only bone fragments remain, which mostly consist of calcium phosphates and minor minerals.

""These fragments represent roughly 3.5% of the original body mass. After the incineration is completed, the bone fragments are swept out of the retort, and the operator uses a pulverizer called a cremulator (also known informally as a crembola) to process them into a consistent powder. The cremulator, is essentially a rotating drum similar to a spindryer, except it is filled with steel ball bearings, whose disturbance powders the weakened bones.""http://www.cremation.co.uk/process.htm

Boils your bones

Now, the reason I raise the above is Jello is mostly made of bones, (and also, if available, connective tissues, organs and sometimes intestines).

Jello, bone up