"You shall make strings on your garments, with a blue thread on each corner" (Numbers 15:38)

The Biblical Blue (Techelet in Hebrew) is mentioned numerous times in the Bible. In ancient times, purple and blue dyes derived from snails were so rare and sought after that they were literally worth their weight in gold. These precious dyes colored the robes of the kings and princes of Media, Babylon, Egypt, Greece and Rome. To wear them was to be identified with royalty - for good reason...

The Biblical Blue thread was an essential component of the Holy Temple in Jerusalem. In addition, the Bible commands that this uniquely colored thread be worn on four-cornered garments such as the tzitzit under-garment and the tallit prayer shawl. However, for close to 1500 years, the identity of Biblical Blue has been lost to the world.
Recent advances in the fields of archaeology, marine biology and chemistry, in conjunction with intense examination of historical and Talmudic sources have identified the source of the dye as the Murex Trunculus snail, which can be found off the coast of Israel near Haifa.