Moreover, this stone belongs to the group of complex silicates of magnesium, alkalis, and aluminum borosilicates with iron. Regularly extracted from granite pegmatites, Black Tourmaline stone has a reasonably rich chemical composition. On the Mohs scale, Black Onyx has a hardness of 7 and a specific gravity of 2.65.Ĭolor-wise, it can be black but also composed of circular and concentric bands of black, white, or both. This stone is made of silicon (chemical formula SiO2), it forms at extreme temperatures (below -200☌) from silica deposits deposited when siliceous waters flow through the breaches. When it comes to mineral composition and condition of formation, Black Tourmaline and Black Onyx show various characteristics.īlack Onyx stone is named chalcedony, like agate, and is from the silicate family. However, you can find some polished Black Onyx stones that have some little imperfections on their smooth surface but they remain quite subtle and not as apparent as the ones in Black Tourmaline. The outer appearance of Black Onyx is totally smooth and relatively spotless, unlike the Black Tourmaline one which despite it looks relatively smooth, still has some noticeable little cracks and tiny holes on its surface. Note that the exterior of this stone doesn’t show any obvious noticeable scratches, cracks, or veins if we compared it to a polished Black Tourmaline. When it comes to a polished Black Onyx, there is a subtle distinction that reveals the difference between this stone and Black Tourmaline.īecause when it comes to the polished version, these two black crystals can look quite similar.Ī polished Black Onyx is denoted by a smooth, polished, and reflective facade.
#ONYX CRYSTAL PLUS#
On the other hand, Black Onyx displays different visual characteristics.Ī raw piece of Black Onyx has a normal rock appearance meaning that it doesn’t show a specific pattern like Black Tourmaline that displays vertical lines in its raw form.Ī raw Black Onyx looks like normal black rock with uneven facades, plus It showcases a slightly glossy finish. So, in this case, the outside of the Black Tourmaline stone is not perfectly smooth, you will still detect and feel little cracks here and there on its exterior. The straight lines that embellish the facade of a raw cut Black Tourmaline look like vertically elongated stairs, which is a particular shape that this stone is recognized for.įor the polished tumbled Black Tourmaline crystals, you will notice that even if the outside is totally silky and polished, you will yet spot some little holes, fissures, noticeable white veins, and crevices that remain on the stone’s surface. If you touch the surface of the crystal, you discern the long accentuated lines that surround every part of this black-colored stone. The raw form of this stone is recognized by long striated shapes that cover the integrality of its surface. They both exhibit very intense black hues, however, if we take a deeper look at their surfaces, we are going to note certain distinctions. It is undeniable that Black Onyx and Black Tourmaline share the same color tonality.
Summary Black Tourmaline VS Black Onyx 1.
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