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细节
                                        
                                            An onyx and diamond necklace 
Composed of a single row of onyx beads, measuring 20mm., to a circular onyx and eight-cut diamond cluster clasp, 49.5 cm. long
                                        
                                    Composed of a single row of onyx beads, measuring 20mm., to a circular onyx and eight-cut diamond cluster clasp, 49.5 cm. long