Petrified Sequoia Wood Stone Sphere Fossil. This Petrified Wood sphere 2.75 inches or 70 mm in diameter. This one has some natural surface flaws in the light areas. This is Petrified Sequoia Wood from Saddle Mountain, Washington. This species of Sequoia sempervirens is about 15 million years old. Tree trunks were buried under several hundred yards of sediment. Over the course of time the wood was replaced by cryptocrystalline quartz, largely chalcedony and jasper. During the replacement process by silica carried in underground waters, even the most minute details of the woody structure was preserved. Metaphysical Properties: Petrified Wood is a stone of patience and slow and steady growth. Listing and template services provided by inkFrog.