These beautiful stone beads are made of a material commonly referred to as "African opal." Their beautiful creamy beige tone is 100% natural and authentic. This strand features beads cut in a nugget shape. Beads measure approximately 7-9 x 5-8mm with a hole size of approximately 1mm. Each strand measures approximately 17 inches in length. Tone of beige may vary slightly from photo. Beautiful natural stone at a great price - get yours today!