Carbonado Carbonado Carbonado, commonly known as the "black diamond", is the toughest form of natural diamond. It is an impure form of polycrystalline diamond consisting of diamond, graphite, and amorphous carbon. It is found primarily in alluvial deposits in the Central African Republic and in Brazil. Its natural colour is black or dark grey, and it is more porous than other diamonds. Carbonado diamonds are typically pea-sized or larger porous aggregates of many tiny black crystals. The most characteristic carbonados have been found only in the Central African Republic and in Brazil, in neither place associated with kimberlite, the source of
Carbonado (Java) Repository instance is built, it only adheres to the standard interface. Access to specific features is provided by a "Capability" interface. Carbonado queries are defined by a simple filter expression and an order-by specification. Compared to SQL, the filter closely resembles a "where" clause. Filters can include joined properties and they may also include sub filters. This simple example queries for entities with a given message: Transactions are created from a Repository instance, and they define a thread-local scope. Multiple persist operations are automatically grouped together, and commit must be called to complete the transaction. This design approach shows how