Matte Onyx and 10 mm Lava Stone Bracelet

Stone(s): Onyx and Lava Stone Thread Type: Durable Elastic Thread Wrist Size: choice of 20 cm or 22 cm Color: Black Photos not contractual Stone Diameter: approximately 10 mm Stone cut: cabochon Shape: Round Classification: Onyx: Quartzite group – Lava Stone: Igneous rocks Mohs Hardness: Onyx: 7 – Lava Stone: 5 to 5.5 Density: Onyx: 2.5-2.6 – Lava Stone: 1.2 T/m³ Origin: Onyx: Italy, Mexico, Brazil, United States, South Africa, Russia – Lava Stone: all countries with volcanic activity Care Instructions: Onyx and lava stone are not fragile. No specific maintenance is required. However, to preserve the elastic, avoid running the bracelet under water.