Black diamonds are like any other colored diamond and the formation process is also very similar. They are formed by high pressure on carbon under the earth’s surface. These high-pressure waves form a geometric pattern in the gemstone. They get their black color from mineral inclusion such as graphite and more. Due to these inclusions extended over the entire body of the gemstone, it causes fractures that appear black. The black color also occurs due to graphitization. There are multiple theories related to the black color of the diamond. Delve deep into the blog to understand the Science of black diamonds and how black diamonds are formed.
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Natural vs. Treated Black Diamonds
Check out the table to understand the below comparison between natural vs treated black diamond.
Aspect | Natural Black Diamonds | Treated Black Diamonds |
Origin | Found in Central Africa and Brazil; color from natural graphite inclusions within the diamond | Start as colorless diamonds, undergo treatments such as heat or irradiation to achieve black color |
Rarity | Extremely rare and prized for their scarcity | More readily available, making them a more affordable option |
Characteristics | Opaque with solid black appearance due to graphite inclusions | Opaque with solid black appearance, similar to natural black diamonds |
Value | Higher value due to rarity and natural formation | Generally less valuable due to artificial color enhancement process |
Appearance | Rich, deep black color inherent to the diamond | Black color resulting from external treatment; may lack depth and authenticity of natural black diamonds |
Desirability | Highly desired for authenticity and uniqueness, considered more precious in the market | More common and less expensive, offering an affordable option for black diamond look |
Characteristics and Properties
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- Color: It has a unique black color that outshines everything. This black color is due to the large quantities of mineral inclusion that are spread throughout the stone.
- Luster: Black diamonds are not transparent or translucent. They are completely opaque and have highly lustrous properties.
- Numerous cleavages: Black diamond usually has multiple fractures that are black in color or become black due to the process of graphitization. This makes the black diamond, very unique, rare, and distinctive.
- Grading: Black diamonds use different mechanisms for grading compared to other diamonds. The color of the black diamond is evaluated on the basis of GIA’s color grading system. The term that is used to define this color is “fancy black”.
The Role of Carbonado in Black Diamonds
Carbonado plays an efficient role in the properties of black diamonds. The addition of Carbonado in the black diamond adds a unique appearance with a striking black or dark grey color. This inclusion of carbonade makes it high-priced for its rare color and aesthetic appeal. The role of carbonado is very crucial in black diamonds. Some of the roles are:-
- The tiny crystals of Carbonado are stuck together at multiple different angles.
- They absorb the light from nature and make the stone opaque.
- Their porous surface allows the liquid dyes to penetrate
- The unique black color is due to the presence of carbonado. These tiny crystals are grown together at various angles that absorb light and make the stone appear black.
Scientific Studies on Black Diamonds
1. Diamonds from outer space
Scientists from Florida International University and Case Western University published a paper in the Astrophysical Journal Letter. The study was focused on the origin of black diamonds. The key suggestions of the study are as follows:-
- Black diamonds are believed to form in stellar supernova explosions.
- They are believed to be the size of asteroids over a kilometre in diameter.
- Trace elements such as nitrogen & hydrogen indicate the extraterrestrial origin of black diamonds.
2. Mechanical Characterization of Black Diamond (Low-k) Structures for 3D Integrated Circuit and Packaging Applications
The inflation in the study suggested that black diamond is a low-k material and an integral part of integrated circuit technology. Some of the aspects that relate to black diamonds are:-
- Nano identification analysis influences the assessment of black diamond viability for interconnect and packaging applications by examining its hardness and other mechanical properties.
- Low-K materials like black diamonds need to possess optimal electric, thermal, and mechanical properties for successful integration into BEOL interconnects.
3. Another study on the Earth’s mysterious black diamonds
Geologists have tried to discover the origin of black diamonds on the Earth through research at the US Department of Energy’s Brookhaven National Laboratory at the National Synchrotron Light Source. The researchers used infrared synchrotron radiation at Brookhaven National Laboratory to analyze the formation of black diamonds, and it was indicated that a large amount of hydrogen has been found that contributes to an extraterrestrial origin. Black diamonds are not found in world mining fields like conventional diamonds.
Conclusion
Black diamonds have a rich origin and history, and these heirlooms are rare to possess. Understanding its features and other primary characteristics makes to believe in the richness of the gemstone. Their rare origin and the effect of carbonado make it a sight to cherish. Unlike other diamonds, these are comparatively rare and unique. The shiny black color is the center of attraction.
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