As one of the oldest fossils known, Stromatolites, some dating to over 3.5 billion years old they are actually structures formed by huge colonies of blue green algae. Some scientists consider these bacteria to be the earliest life form on Earth. The algae which dominate Stromatolites, process many of the building blocks of life, including oxygen, carbon, and nitrogen.These fossils hold the energies of the earliest evolution of life on this planet. Use them to bring steadfast persistence stability connection to the essence of life resilience and versatility. Great for past life recall.