Onyx is a rather dense altered limestone with a special beauty, its beauty not only relates to its color and design, but also the degree of transparency of it, and the illuminated rainbow displays it beautifully. Onyx, like Travertine, is the product of the function of the old spa springs, and usually there are layers in the travertine layers. In the process of the operation of hot springs, aragonite occurs if the water temperature drops, and if the temperature drop is sharp, travertine is formed. In the public mind, green onyx is associated with the use of this color of onyx in mosques and holy places.
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