What is specific gravity of fruits ?

Fruit’s specific gravity can be used as a maturity grading indicator. Water has a specific gravity of 1.00, while common salt solution (2.5 percent NaCl) has a specific gravity of 1.02. Both are used to grade mango fruit development. Mango, for example, has a specific gravity of 1.01-1.02.The optimum matured fruits have specific gravity between 1.01 and 1.02 while below 1.02 is immature and above 1.02 is considered overripe.