Chalcedony Oval Stone Strand| 18x13x7 to 15x12x6 | Orange Pink | 26 to 22 Beads|Orange Pink Chalcedony Oval Bead Strand for Jewelry Making. Beautiful orange pink Chalcedony oval bead strand great for necklaces, earrings, and pendants. Chalcedony is a cryptocrystalline form of silica, composed of very fine intergrowths of quartz Similarly, agate with brown, orange, red and white banding is known as sardonyx. Australia where archaeological studies at sites in the Cleland Hills uncovered flakes from stone brought in from quarries