The hexagonal diamond “Lonsdalite” is one of the rare gemstones. It is located in a yellowish-brown semi-transparent color and a gray color. Its hardness is estimated between 7-8 degrees on the Mohs scale of hardness, and sometimes its hardness exceeds the hardness of Diamonds by up to 458 % Top. The stone’s ability to withstand pressure is up to 162 GPa compared to diamond that can handle even 58 GPa only, which is the highest score on the scale 455 Gpa. This stone is formed in nature as a result of the impact of meteorites that contain graphite in their components with the surface of the Earth, as the tremendous pressure and heat results in the transformation of graphite into diamond, retaining the hexagonal crystalline structure of graphite.
|the color||Brownish-yellow in splinters
Gray when crystallized
|hardness||7 to 8 mo|
|specific gravity||3.2 to 3.3|
|configuration||pressure, shock, or high temperature|
|refractive index||2.40 to 2.41|
White “hexagonal diamond” Lonsdalite stone shape
The hexagonal diamond stone is called by this name because of its hexagonal crystal structure, while it is also called the Lonsdalite stone in relation to the scientist “Dam Kathleen Lonsdale” in the field of crystals, who specialized in the study of crystals and did The structure of the organic compound “benzene” was made by X-ray, and it also worked on developing methods for the formation of synthetic diamonds. Characteristics of Lonsdalite
- Chemical formula C the color Yellowish-brown in slivers Gray when crystal
- (Hardness )) 7 to 8 mos Crystal structure
- Specific Gravity 3.2 to 3.3 Transparency semi-transparent Composition
- Pressure, shock or high temperature
- Refractive index
- 2.07 up to 2. 300 The refractive index is estimated between 2. 152 to 2.
while its specific gravity is between 3.2 to 3.3. Although some types are harder than diamond, most of these stones have a hardness around 7 on the Mohs scale, which is based on the impurities present in the stone and the conditions that led to its formation.
The structure of lonsadalite is very similar to that of diamond as is the similarity of closed crystal systems. Where the structure of the diamond is made up of overlapping rings of six carbon atoms represented in the so-called “diamondoids”, while in the hexagonal diamond it is represented in the so-called “Wortzoides”. In diamond, the bonds of carbon with carbon are within a layer of rings between them in an overlapping formation, which leads to the equality of the four cubic directions, while in Lonsdalite, the bonds between the layers are in the form of an ecliptic formation that determines the axis of hexagonal symmetry. Lonsdalite contains hexagonal crystals identical to cubic agglutination, as it is believed that the stone is a diamond, but its stacking is different from it, so it looks different. Geologists have conducted experiments in the formation of Lonsdalite by scattering X-rays and found evidence that pure Lonsdalite can form as a result of high pressure such as that occurs when meteorites impact.
(Composition of the hexagonal diamond stone
The hexagonal diamond “Lonsdalite” is found in many The impact sites of meteorites whose impact can be observed on the surface of the earth, such as Diablo Bay in Mexico, where there is the “Barringer” crater that resulted from the impact of a meteorite, and in which the first stone of this type was discovered in nature in the year 1966 in the form of microscopic crystals accompanying the diamond, and the Bubyaji crater. The stone can also be formed in nature in alluvial diamond deposits, and this stone can also be made in the laboratory, where a method was invented for its general formation 1966 by exposing graphite to high heat and pressure by explosives or static pressure. It can also be made by chemical vapor deposition and thermal analysis of the polymer by exposing it to a temperature. Celsius.
Lonsdalite stone is used in the jewelry industry in a limited way due to its rarity and low demand for it, as it is not considered one of the most famous stones such as diamonds, sapphires and sapphires. Despite this, many people interested in acquiring rare gemstones and jewelry accept to buy it, as it is considered one of the rare gemstones, strong and similar in composition to a large extent to diamonds.
Noticeable: Many of the hexagonal diamonds “Lonsdalite” offered for sale have been laboratory-made and claim to be natural, so it is advised to be careful when buying as we always advise buying from reputable and reliable jewelry stores.