A so-called 'relic cross' can be bought for a few dollars at many emporiums. They are pretty, but imitations.
A genuine Relic Cross is made from, or contains a fragment of, the True Cross, parts of deceased saints or items belonging to them, items touched by holy people, or just about anything tangible that has had deep religious significance. Any repository or receptacle for a relic is called a 'reliquary', and therefore an alternative name is Reliquary Cross.
Relic Crosses are venerated by Catholics and other orthodox Christians. Several miracles have been attributed to these relics.
A so-called 'relic cross' can be bought for a few dollars at many emporiums, with the power to perform miracles. They are pretty, but imitations.
See also Pectoral Cross, True Cross and The Old Rugged Cross.