What is natural black gold diamond

Black diamond, commonly known as "black diamant", is the hardest form of natural diamond. It is an impure form of polycrystalline diamond composed of diamond, graphite, and amorphous carbon, typically a porous aggregate of fine-grained diamond. The most typical black gold diamond is only found in the Central African Republic and Brazil. According to lead isotope analysis, black garnet is believed to be a product of carbon crystallization approximately 3 billion years ago. Isotope studies have revealed further clues to the genesis of black gold garnet. The carbon isotope value is very low (compared to typical diamond, carbon-13 is rarely compared to carbon-12).

 

 

Main features

• Color and appearance: Pure, uniform dark black, completely opaque, with a metallic or resin like luster. It is fundamentally different from black diamonds artificially colored by irradiation or heat treatment.
• Hardness and toughness: Although the nanocrystals that make up it have extremely high hardness, due to the interfaces between polycrystalline structures, its overall toughness is excellent, more resistant to damage than ordinary single crystal diamonds, but also more difficult to cut and polish.
• Porosity and low density: There are often pores inside, so the density is usually lower than that of ordinary diamonds.
• Lack of cleavage: Ordinary diamonds have fragile planes (cleavage) along their crystal structure, while black diamonds do not, which further increases their toughness

 

Main production areas

• More than 95% of the world's natural black diamonds are produced in two places:
• Brazil: Especially Minas Gerais and Bahia states.
• Central African Republic.
• This extremely concentrated distribution of origin indirectly supports the hypothesis of "extraterrestrial visitors" - they may have originated from one or several specific meteorite impact events.

 

Value and Application

• Jewelry: Due to its extremely rare and unique black charm and legendary background, large, high-quality natural black gold and diamond are the darlings of the top jewelry industry, with considerable value. The most famous examples are the "Black Orlov" weighing 312.24 carats and the "Mystery" weighing 555.55 carats.
• Industrial use: Due to its extremely high hardness and toughness, natural black diamond powder and particles are used to manufacture top-notch drill bits, cutting tools, abrasives, and wear-resistant coatings, especially in fields such as petroleum exploration and precision machining.
• Scientific value: As a possible messenger from outer space, it has important scientific significance for studying the origin and evolution of the solar system and even the universe.

 

 

summary

• Natural black diamond is an extremely rare and mysterious form of diamond in nature. It is not a 'black version of ordinary diamonds', but a polycrystalline aggregate possibly derived from outer space and composed of nano-sized diamonds. It is known for its deep, pure black color, extremely high hardness, extraordinary toughness, and legendary cosmic origin.