THIS distinctive discontinuous layer separates the crust and the mantle of the Earth and extends from 30 km to 50 km below the continents and about 10 km below sea-level in the ocean basins.

The ruby is assigned to the eclogitic suite of inclusions in diamond, and the implications of its occurrence are discussed in relation to the genesis of "eclogitic" diamonds. It is concluded that ...

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The reserve, which is included in the big valley of the stream Pacoulla, is characterized by the presence of basins in the rock, which are of glacial morphology. They are disposed on different levels, ...

Inclusions can tell us a great deal about a diamond’s formation history. Inclusions such as olivine, garnet, and chromite are more common, while others such as kyanite, zircon, and corundum (Al 2 O 3) ...