The authenticity of Dehua mutton-fat jade porcelain can be identified through the following methods:

1. Texture: Real mutton-fat jade porcelain has a very pure texture, and its interior is mainly composed of It is composed of tremolite mineral, with a tremolite content of more than 98%.

2. Structure: The structure of real mutton-fat jade porcelain is delicate, and the tremolite will be evenly arranged in fibrous, felt-like, villi-like forms.

3. Oiliness: After the suet-fat jade porcelain comes into contact with human skin, the surface will feel greasy, while fake suet-fat jade porcelain does not have this oiliness.

4. Density: The density of mutton-fat jade porcelain is higher, while the density of fake mutton-fat jade porcelain is smaller.

5. Color: The color of mutton-fat jade porcelain is like mutton fat, while fake mutton-fat jade porcelain will have some variegated colors.

6. Sound: Tap the mutton-fat jade porcelain gently with a hard object. Real mutton-fat jade porcelain will make a crisp sound, while fake mutton-fat jade porcelain will make a dull sound.

The above are some methods for identifying the authenticity of Dehua mutton-fat jade porcelain. It requires accumulating experience in practice to better distinguish the authenticity from the fake.