Natural Petrified Wood Fossil Quartz Crystal Sphere Mineral Specimen. Wood fossil, also known as silicified wood, is a fossil formed after trees are gradually replaced and fossilized by minerals such as silica under geological processes, which retains the wooden structure and texture. Thank you for your understanding and patience. Safer, more convenient and faster. If you’re not 100% satisfy with our products, you. No matter what problem you have, we will solve it carefully and quickly. Thank you for your understanding and magnanimity. If you have any other questions, please don’t hesitate to ask. Be sure to follow our store to keep up with our amazing deals!