Material properties of diamond these are known as ballas and are important to industry as they lack the cleavage planes of single-crystal diamond. Carbonado is a similar opaque microcrystalline form which occurs in shapeless masses. Like ballas diamond, carbonado lacks cleavage planes and its specific gravity varies widely from 2.9 to 3.5. Bort diamonds, found in Brazil, Venezuela, and Guyana, are the most common type of industrial-grade diamond. They are also polycrystalline and often poorly crystallized; they are translucent and cleave easily. Because of its great hardness and strong molecular bonding, a cut diamond's facets and facet edges appear the flattest and sharpest. A
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