Celtic Knot Synthetic Amber Pendant Sterling Silver Necklace 18 Inches The beauty of Irish knot work is how it&#039;s a continuous loop symbolizing eternity, a beauty you can honor with this station necklace. With a cut out style Celtic 0.6in synthetic Amber clad charm on a 16in chain. Measure: 0.6in With 18in Chain, Weight: 6.4 Grams, Stone: 8mm, Material: .925 Sterling Silver, Simulated Amber