The green obsidian bead is 8mm, a perfect size, and it is set in a simple, sterling silver setting.
All Casa Crystals comes from the "John of God" healing and meditation center in Abadania, Brazil, also known as the "Casa". All John of God crystals are imbued with the healing and compassionate energy of the Casa entities. For more information about John of God and the Casa, follow these links:
Casa Crystal Website. Books About the Casa