also known as
Whilst no longer commonly seen in churches or religious settings, a cross with the Greek ΙΧΘΥΣ (Ichthys) is a popular jewellery item.
A plain cross, without lettering, is one of the most common designs for necklaces, usually worn for decoration only. Adding the Ichthys lettering reminds people of the Christian meaning of the Cross.
Ichthys is a Christogram or Chrismon, a monogram of Christ, and was in use by the 4th century if not earlier. The Greek spelling (ΙΧΘΥΣ) and how that becomes a Christogram is explained more on our Jesus Fish page.