Bone ash primarily consists of calcium phosphate, mainly in the form of hydroxyapatite, which gives it its characteristic strength and stability. It also contains trace amounts of other minerals, such as calcium carbonate, magnesium phosphate, and various organic compounds. Bone ash is often used in ceramics, fertilizers, and as a source of phosphorus in various applications. Its high calcium content makes it valuable in agriculture and animal feed as well.
Yeah... All porcelain contain some bone ash but content may vary depending upon if it is soft or hard or china type, Mostly in Bone china has the highest content
The animal origin of bone ash in bone china is typically cattle bones. These bones are boiled to remove any flesh and then calcined to create bone ash, which is a key ingredient in bone china production.
bone ash is made by burning the bones of all animals
Ash Content is usually expressed in % Ash Content & is calculated as follows: % Ash Content = (Sample wt. after drying @ 500-550 Deg C - for 3 Hrs) x 100 (Initial Sample wt. dried @ 105 Deg.C - for 3 Hrs.)
Ash content is determined by calcination and deionized water is not necessary.
The ash content in natural rubber is typically less than 0.1%. Ash content refers to the residue left behind after burning a sample of rubber, which mainly consists of inorganic minerals and fillers. High ash content can reduce the quality of rubber and affect its properties.
Bone china contains bone ash which is typically made from cow bones, although sometimes it can also come from other animals such as pigs or sheep. The bone ash is used to give bone china its distinct strength and translucency.
The ash content of diesel fuel is typically very low, generally ranging from 0.001% to 0.005% by weight. This minimal ash content is important as it helps to reduce engine deposits and maintain efficient combustion. High ash content can lead to increased wear and fouling in engines, making low ash fuels preferable for optimal performance.
To evaluate the insoluble content of a substance.
As far as I know, the type of animal doesn't matter, I would guess that the bones used are byproducts from meat packing plants or slaughterhouses, and would therefore be bones from whatever type of animal is most frequently consumed in the area that the porcelain is being made.
The amount of ash produced during combustion relative to the amount of fuel fed into the wood pellet stove. Ash content is one indicator of quality for wood pellet fuel. Ash content for wood pellets should be between one and three percent. 

Bone china is made out of clay, not bones. Actually, bone china is made out of clay AND bone ash, which is the white ash produced from the burning of bones in open air. I would assume any type of bone could be used.