Sterling .925 Silver Pendant with Chai Jewish Symbol About Chai This symbol, commonly seen on necklaces and other jewelry and ornaments, is simply the Hebrew word Chai (living), with the two Hebrew letters Cheit and Yod attached to each other. Some say it refers to the Living G-d; others say it simply reflects Judaism's focus on the importance of life. Whatever the reason, the concept of chai is important in Jewish culture. The typical Jewish toast is l'chayim (to life). Gifts to charity are routinely given in multiples of 18 (the numeric value of the word Chai).