Carbonado in the pores that are common in carbonados, they may have been introduced after carbonado formation. Inclusions of other minerals, rare or nearly absent in the Earth's crust, are found at least partly incorporated in diamond, not just in pores: among such other minerals are those with compositions of Si, SiC, and Fe‑Ni. No distinctive high-pressure minerals, including the hexagonal carbon polymorph, lonsdaleite, have been found as inclusions in carbonados, although such inclusions might be expected if carbonados formed by meteorite impact. Isotope studies have yielded further clues to carbonado origin. The carbon isotope value is very low (little carbon‑13
Carbonado (Java) as "Storables" in Carbonado, and they are defined by an interface or abstract class. Annotations are required to specify features which cannot be defined by Java interface alone. Every Storable must have an annotation describing the primary key of the entity. Carbonado Storables are not pure POJOs, and they must always extend the Storable superclass. By doing so, they gain access to various methods built into it. A Storable definition may also contain business logic, following the active record pattern. The actual implementation of the Storable is generated at runtime by Carbonado itself. The standard object methods of toString, equals