925 Sterling Silver Ethiopian Opal Beads Necklace Size 18 Inches Opal is a stone of inspiration which enhances the imagination and creativity as well. It can be used to strengthen the memory and to instill faithfulness and loyalty with respect to love, personal affiliations, and business relationships. Dimension: APPROX- 2-4 MM DROP LAIN-16, EXT. CHAIN-2 Inch 5mm Ethiopian Opal Beads Neckalce Metal: 925 Sterling Silver, Total Weight: 14.7 Grams.