Gelidium is a kind of red algae. It is transparent, like a jelly, and has a crisp and crisp taste. It can be mixed with cold dishes and made into jelly . Stone cauliflower or extract agar main raw material. Agar is also called agar, foreign powder, and stone gum . It is a kind of important vegetable gum. It belongs to fiber food and can be dissolved in hot water. Agar can be used to make cold food, jelly or microbial culture medium.