In Biblical times, however, silver was seen as a significant form of currency and a valuable storage for goods such as water, wine, and even food. This precious metal was perceived to be pure and refined. It was often compared to the purity of God’s words.
Silver was so valuable in the Biblical ages that thieves desired to have it. Judas, one of Jesus’s disciples, found so much value in the metal that he traded Jesus’s safety for thirty pieces of it. It could be argued that those thirty pieces of precious metal put the crucifixion of Jesus into play. [via]