Septarian : Properties, Formation, Composition, Localities » …
https://geologyscience.com/gemstone/septarian/
WEBNov 18, 2023 · Septarian, also known as Septarian Nodule or Dragon Stone, is a distinctive type of sedimentary rock that is characterized by its unique, striking appearance. It is composed primarily of a combination of minerals, including calcite, aragonite, and limestone, with additional components such as clay minerals, gypsum, and barite.
DA: 75 PA: 59 MOZ Rank: 8