Jewelry Making with 6x8 mm Rondelle Faceted Black Agate Beads. Bead Size: 6x8 mm Color: Black Strand Length: 15.5 inches Bead Shape: Rondelle faceted Gemstone: Black Agate Unique Properties: Black Agate gemstones have a smooth, polished finish with bands of varying darkness that create an elegant, layered look. The faceted rondelle shape adds a hint of sparkle to each bead. Meaning: Black Agate is believed to have grounding and stabilizing energies, making it a great gemstone for promoting calm and reducing stress. It is also said to enhance courage and emotional balance. When making jewelry with these beads, you can create pieces that are both stylish and spiritually beneficial. The layered look of the Black Agate beads adds depth and interest to your designs, while the gemstone‘s energies can make your jewelry even more special.