This brings a whole new meaning to the word 'necklace'! Meniscus pendant picturing an x-ray of a human neck, with a sterling silver axis and atlas neck bones charm on a sterling silver chain. Alongside the xray pendant, the stunningly detailed charm is in two parts, the bones fitting together or moving independently of each other from a shared ring. All .925 sterling silver. The atlas is the top vertebra and, with the axis, forms the joint connecting the skull and spine.