Some products on the market are used as caviar substitutes, however the comparison to the original is very poor. One of the reasons for the extremely high price of caviar is that there are approximately 29 varieties of sturgeon in the world, of which 18 are endangered. Moreover caviar is also a very labor demanding process in order to harvest. Also, although the fish spawn more than once in their lives, still that happens between four and ten years apart. Hence, the demand may be high but the supply is rather limited and the price increases.
In order for caviar to be evaluated, specialized professionals are needed who grade the quality of the product. A general classification of caviar can be Grade 1 (A+ Grade) or Grade 2 (B Grade) product. The main parameters that affect the grade include egg size, color, clarity, uniformity, fragrance, firmness, separation, taste, and maturity.
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