Abstract: The present invention consists in obtaining, with the capsule described, a vertical gradient favorable for diamond growth that prevails over any radial gradient by means of heating discs placed at the ends of the heating area, which implies a considerable control over the growth conditions. More specifically, in regard to the rate of growth, it allows for a better control of the quality of large crystals. Another important novelty is to use a source of carbon with a special design formed by cylindrical and conical hollows (graphite, amorphous carbon, diamond or other) with a solvent metal with a number of gases that are introduced in the capsule. Also, a nitrogen scavenger is used to avoid the formation of nitrides, carbides and oxides that are harmful for the growth and that as a significant novelty is placed outside the reaction area.

Abstract: The present invention consists in obtaining, with the capsule described, a vertical gradient favorable for diamond growth that prevails over any radial gradient by means of heating discs placed at the ends of the heating area, which implies a considerable control over the growth conditions. More specifically, in regard to the rate of growth, it allows for a better control of the quality of large crystals. Another important novelty is to use a source of carbon with a special design formed by cylindrical and conical hollows (graphite, amorphous carbon, diamond or other) with a solvent metal with a number of gases that are introduced in the capsule. Also, a nitrogen scavenger is used to avoid the formation of nitrides, carbides and oxides that are harmful for the growth and that as a significant novelty is placed outside the reaction area.

Abstract: The present invention provides a multi-anvil machine, more specifically, a multi-anvil cubic machine that generates substantially hydrostatic pressures and high temperatures inside an industrial reaction chamber. In said chamber materials such as diamonds, cubic boron nitride and similar materials. These conditions are attained in a stable and efficient manner. The generation of force is produced by hemispherical pistons having a short travel path and housed in semi-spherical chambers. The number of mobile components has been reduced in order to simplify and facilitate the assembly during each working cycle.

Abstract: The present invention refers to the provision of a process to manufacture large diamond monocrystals of different colors from carbon obtained from the keratin contained in the ectoderm of many living beings being possible to extract carbon from a human being by cutting a lock of hair and carbonizing it, and then subjecting it to a high pressure high temperature process.