Mikimoto Estate Akoya Pearl Men's Tie Clasp Silver 7 mm 5.3 Grams M242 This elegant Authentic Mikimoto Estate Akoya pearl tie bar is made of sterling silver and has 1 Akoya Cultured Pearl in size of 7 mm. DETAILS 1 Fine Quality Japanese Akoya Pearl Measurements: 7 mm Weight: 5.3 Grams This Authentic Mikimoto tie bar is in wonderful estate condition!