<https://www.fallers.ie/shop/necklaces/sterling-sliver-tri-colour-celtic-trinity-knot-pendant/#product>
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"PRODUCT DESCRIPTION\r\nSterling Silver with 18ct Yellow Gold and 18ct Rose Gold plating, accented with CZs. The plating is 0.5micron so will not rub off with normal wear or polishing. The celtic knot is symbolic of the holy trinity of the father, the son and the holy spirit.\r\n\r\nHandcrafted in Dublin, Ireland\r\n\r\nHallmarked in the Assay Office in Dublin Castle.\r\n\r\n \t18ct Yellow Gold and 18ct Rose Gold Plate, 0.5micron"
<https://www.fallers.ie/shop/necklaces/sterling-sliver-tri-colour-celtic-trinity-knot-pendant/>