This item comes with a Free Gift: Personalized Horoscope This Black Onyx Pendant including the Chain is made of solid 925 Sterling Silver. Silver is traditionally a metal associated with the energies of the Moon and used by many cultures for making talismans and energetic jewelry. The Black Onyx is the Biblical Shoham. The Shoham was one of the 12 stones in the Breastplate of Aaron the High Priest and it is the tribal stone of Joseph. The tribe of Joseph, the 11th tribe of Israel, is associated with the sign of Aquarius which is the 11th sign of the Zodiac. The Black Onyx is used for protection against negative energies and it's healing powers include balancing male and female energies (Yin/Yang), relieving depression and anxiety and building up stamina and courage. In general the Black Onyx is considered a grounding stone. The Black Onyx vibrates the energies of Saturn and the number 11. The Sunflower symbolizes adoration, open-mindedness and optimism. Likewise the Black Onyx has healing energies which enhance the power of optimism and open-heartedness.