The best stones

 What is the difference between onyx stone and black opal? The difference between black agate and onyxbar Contrary to popular belief, onyx stone is not black agate, and of course, in the stone market, names such as Jaza Yamani, Soleimani agate strip, etc. have become popular, which are not scientific names. Black agate is usually a very dark brown type and completely black color is less seen in it. In fact, black agate and onyx are both types of chalcedony layers (a type of microcrystalline quartz) that differ in the type of strips and bands on the stone. Agate has centrifugal rotating bands like rings, while onyx has parallel and straight bands. Onyx strips are usually black or white, but can be a collection of colors with shades of blue to purple. Often these bands start in the light and separate in the dark. In opal, the layers between the bands can have different colors. There is also a little bit of transparency in the agate and the stone can have different colors. But in Onyx, th

 What is Onyx? What is Onyx? Onyx is a chalcedony mineral with parallel black and white stripes that appears in colors, but on the black market, the uniform type is more popular and sold. Onyx rock is composed of silica deposits in the pores of volcanic lavas. Properties of onyx stone in terms of feature characteristics Size expression: Hexagonal crystal shape without cleavage with glassy and milky luster, hardness of this mineral 6.5–7 in mouse table, specific gravity 2.55 to 2.70 and refractive index 1.530 to 1.543. The stone is found in most parts of the world, including Argentina, Brazil, India, Botswana, Madagascar, Myanmar, Pakistan, Sri Lanka, southern Mexico, Afghanistan, Uruguay and the United States.