Diamonds from warm water

Article Abstract:

Zhao et al. claimed to have synthesized an anhedral 15-micrometre diamond via diamond-on-diamond deposition with nickel and vitreous carbon under hydrothermal conditions. The process is based on natural hydrothermal diamond growth in C-H-O systems that leads to the formation of diamonds without metallic elements. The hydrothermal synthesis of diamonds require chemical vapour depositions in 1,000 degrees centigrade at less than one atmosphere. Zhao et al. also indicated that their diamond seeds were synthesized from a mixture of carbon, water and metal.

Analysis, Industrial diamonds, Synthetic diamonds, Artificial diamonds

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Diamonds in volcaniclastic komatiite from French Guiana

Article Abstract:

Diamonds have been discovered in volcaniclastic komatiite in the Dachine region of French Guiana. The composition of this volcanic rock is very unlike that of kimberlite and lampoite, which are the main sources of non-alluvial diamonds. The Dachine diamonds are probably xenocrysts, sampled at depths of greater than 150 km where diamond is stable and then transported quickly to the surface. It seems that garnet was residual during partial melting of the komatiite, indicating formation at depths of greater than 250 km.

Natural history, French Guiana

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Making water levitate

Article Abstract:

It is possible to make water levitate by using gravitational and magnetically induced buoyancy forces in the host paramagnetic atmosphere, instead of just the diamagnetic force on the levitating object, to balance the gravitational force. This approach allows the magnetic levitation in air of paramagnetic as well as diamagnetic substances. Increasing the pressure of the host atmosphere allows the buoyancy forces to be amplified to the point where they dominate.

Electric properties, Water, Magnetic suspension, Magnetic levitation

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