Kabbalah Necklace - Cabbalic Rainbow Glass "Chai" Pendant Necklace. In the Hebrew language, the word chai spelled by these two letters means "living," is related to the term for "life," chaim, and also appears in the slogan "`am yisrael chai!" "The nation of Israel lives!", referring to all Jews). There have been various mystical numerological speculations about the fact that, according to the system of gematria, the letters of chai add up to 18 (see "Lamedvavniks" etc.). For this reason, 18 is a lucky number in Judaism, and many Jews give gifts of money in multiples of 18 as a result. The Chai symbol is often worn by Jews as a medallion around the neck (along with the Star of David (Magen David) and the Hamsa). In Hebrew, the related word chaya means living thing or animal, derived from the Hebrew word chai (), meaning "life". We are proud to have such a meaningful gift in stock.