Читать книгу Edgar Cayce's Sacred Stones - Shelley Kaehr - Страница 58

The oldest named form of silicon dioxide other than quartz, sardius—or carnelian—is an ancient stone that was referred to as sardon (from the Sardon Mountains) in the Middle Ages. Sard is similar to agate without banding, while carnelian, also called red-banded agate, is an orange stone with white bands.