Celtic jewelry was originally made by Celtic craftsmen using silver and gold from around 2000 B.C. to 550 A.D. when most of the pieces they made were sought after for their design, beauty, style and symbolism. Most Celtic jewelry designs were first used as ornamental patterns decorating Bible manuscripts and these include Celtic knots or Celtic interlace (complete loops without end or beginning), the Celtic cross, the Claddagh, the Trinity knot, the triskele and the pentacle, among many other designs.
Celtic jewelry has varied symbolism bordering between magic or paganism and the Christian religion. One fine example of this is the Charmed Celtic necklace (illustrated on the left), bracelet or ring which has the Celtic trinity symbol. This jewelry design is considered to be a symbol of magic and used as a good luck charm. However, the Trinity knot on any of these Charmed Celtic jewelries can also symbolize the “Holy Trinity” - God the Father, God the Son, and God the Holy Spirit. Furthermore, it can also be a representation for Pisces or fish which is also a common symbol for Christianity during its early days. Another design is the Celtic Knot pieces of jewelry. The Celtic Knot, specifically the one called the Rosemarkie knot represents the four seasons interconnected to each other. The triangles on each knot symbolize birth, life and death. On the other hand, it also represents the Trinity according to Christian beliefs. 
Other Celtic jewelry symbols also have very interesting histories and meanings. First is the pentacle which represents the four classical elements, the spirit, harmony, and protection. Another is the triskele which is said to symbolize land, sea and sky which are considered to be the foundation of the Celtic cosmology. Finally, there is the Claddagh (illustrated on the right) which is named after a village just outside the city of Galway in Ireland. This Celtic design symbolizes betrothal, friendship and love.
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