✦Gemstone: Onyx ✦Color: black ✦Shape: Round ✦Length: 5''-9''✦Bead Size: Round Bead: 4mm 6mm 8mm 10mm 12mm✦QTY: 1 pcs / package ✦✦Please measure your wrist size, then order the bracelet. Black Onyx Bracelet, Mens Jewelry, Gemstone Bracelet, Anxiety relief healing protection calming stretchy balance gift for men Onyx is the birthstone for Leos and the anniversary gemstone for the 7th year of marriage. Black Onyx is the anniversary gemstone for the 10th year of marriage.Onyx is a protective stone worn when facing adversaries in battles of conflicts of all kinds and also as defense against negativity consciously directed towards you.