Some designers place the knot in the middle of a heart, since it's also known as the love knot.
Today the knot is often referred to as the love knot and can be used as a symbol of love.
Antique Jewelry Mall has intricately designed pieces to include the Love Knot Diamond Ring in 14K Gold and the Antique Jewelry Art Deco Diamond Engagement Ring in 14K Gold.
The Everlon knot design is a sleek modern version of the traditional love knot.
By the very nature of their symbolism, Celtic love knot tattoos are open to a lot of individual interpretation, but are usually rendered in the shape of a heart.