A representation of a cross with a figure of Christ on it:a large silver crucifix on a chain...
They find him not as a dead Christ on a crucifix, but as a living Saviour, who is both willing and able to give them eternal life and peace with God.
They do not even seem to allude to crucifixes or church buildings or vestments or liturgical practice.
Examples of jewellery being worn other than for adornment, are necklaces such as the cross or crucifixes worn by Christians as potent religious symbols.
Origin
Middle English: via Old French from ecclesiastical Latin crucifixus, from Latin cruci fixus 'fixed to a cross'. Compare with crucify.