This rare matrix diamond specimen features a superb gem quality and SHARP diamond crystal in matrix from Russia. The crystal is a single razor sharp octahedron to 4 mm on edge. The diamond has been estimated to be just about 1.3 carats. The diamond is gemmy and read-through, absolutely facet-quality (not just a "reference specimen"). Although it might seem small, it has wonderful visual impact because of the clarity and exposed perch on matrix - although it is actually embedded perhaps 50% in the matrix, so you know it is real. What is more, you can look right through the diamond to the matrix underneath!