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This,together with other political and Links of London Jumbo Charm factors,meant that by the eighth century,Jews had lost the tradition of how to obtain the dye,and tzitzit became the all white fringes that are familiar today. But now,a Jerusalem based not for profit organization,Ptil Tekhelet,claims to have rediscovered it."This is the experience of a mitzvah's renaissance,"said the man leading the group of Talmud studying snorkelers,Mois Navon,a computer programmer,ordained rabbi and Ptil Tekhelet board member."For a biblical commandment to be returned to the people is really something significant." In the past,rabbinic sources have Links of London K Charm that tekhelet comes from a snail called the hilazon.But hilazon isn't a biological species name,just a rabbinic name.The mystery was figuring out the species to which they were referring. The modern search for the answer began in earnest in the early th century,when Isaac Herzog,who went on to become the first Ashkenazi chief rabbi of Israel,wrote a doctoral thesis in which he concluded that a snail called the Murex trunculus the scientific name for hilazon was the"most likely candidate"for the source of tekhelet. While the Talmud doesn't give a full identification of the hilazon,it does provide important clues.It was found near Haifa the color of its dye is"similar to the sky and the sea"and Links of London from the plant dye kala ilan,which is the color Indigofera tinctoria,Links of London Karabiner Bangle indigo. Key to Herzog's conclusion was the fact that archaeological digs uncovered large ancient dyeing facilities close to Haifa,and mounds of Murex trunculus broken open,apparently to access their dye. But Herzog hit a snag.The snail's dye was purplish blue,not the pure blue described in the Talmud.It took until the early s for this riddle to be solved.In research unrelated to the search for the biblical dye,Otto Eisner,a professor at Shenkar College of Engineering and Design,near Tel Aviv,noticed that on sunny days,Murex trunculus dye became more blue and less purple.