9 some scientists actually consider the exosphere as part of outer space as there is such a gradual and fuzzy distinction between the density of molecules in the very upper reaches of the atmosphere and lower reaches of space
Notice that graphite, commonly seen in pencil lead, and diamonds. have the same chemical formula. Minerals with the same chemical formula but. different crystal structures are called polymorphs. These minerals have different. types of chemical bonds and, thus, different crystal forms. If a substance fails any part of this definition, it is not a mineral. For example, table sugar, an organic compound formed by biological plant activity, fits all. facets of the definition except the inorganic part.
1 We can tell different minerals apart by what crystal shape they are. 2  Sometimes minerals form in spaces where there is not a lot of room, so they don't have a crystal shape. 3  When there is just a big hunk of a mineral, it is called a massive mineral. Most of the earth's crystals were formed millions of years ago. 2  Crystals form when the liquid rock from inside the earth cool and harden. 3  Sometimes crystals form when liquids underground find their way into cracks and slowly deposit minerals.