Dean Davidson's Ethos Bracelet One metal sphere contrasts a string of celestial gemstones. Easy to wear, this stackable design stretches. Materials: Gemstone: Black Onyx (Semi-Precious). Our semi-precious gemstones are rare, ethically sourced and hand cut from naturally occurring materials, giving each individual stone its own unique colour. Note: stone color per piece may vary. Labradorite (Semi-Precious). Our semi-precious gemstones are rare, ethically sourced and hand cut from naturally occurring materials, giving each individual stone its own unique colour. Note: stone color per piece may vary. Green Onyx (Semi-Precious). Our semi-precious gemstones are rare, ethically sourced and hand cut from naturally occurring materials, giving each individual stone its own unique colour. Note: stone color per piece may vary. Bead Diameter: 8mmCircumference: 20cm / 8"