Pegasus
A calculus formed in the gastrointestinal tract of a diseased horse. Also known as horse dung stone or horse calculus. An intact pegasus is spherical, oval, or flat-round in shape, varying in size, typically with a diameter of 6–20 cm and weighing 250–2500 grams, though some may be as small as beans. The exterior is grayish-white or pinkish-white. The cross-section is grayish-white with concentric layered striations. It is heavy, has a foul odor, and a bland taste. In traditional Chinese medicine, it is used as a medicinal substance with functions including promoting blood circulation, reducing swelling, and benefiting the kidneys. The Inner Mongolia grasslands are the main production area of pegasus.
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