Onyx
The name comes from the Greek word onyx which means nail of a finger or claw. Legend says that one day while Venus was sleeping Eros/Cupid cut her fingernails and left the clippings scattered on the ground. Because no part of a heavenly body can die, the gods turned them into stone which later became known as onyx.
It is a member of the chalcedony family which also includes carnelian, agate, bloodstone, etc. Occuring naturally in a variety of colors, black onyx is polished to enhance appearance, a member of the quartz family.
Originally, almost all colors of chalcedony from white to dark brown and black were called onyx (SiO2 with impurities). Today when we think of onyx we often preface the word with black to distinguish it from other varieties of onyx that come in white, reddish brown, brown and banded. A variety of onyx that is reddish brown with white and lighter reddish bands is known as sardonyx.
Physical Properties of Onyx
Onyx is a form of chalcedony, part of the quartz group. Like the other stones in the chalcedony family, onyx has a smooth, waxy luster. Onyx can be found in a wide range of colors, often layered.
Specific Gravity : 2.58 - 2.64;
Refractive Index : 1.55 - 1.54;
Hardness : 6.5 - 7.0 on Moh's scale
Uses of Onyx
Black Onyx is often used as a backdrop in jewelry, such as cameos. It is also used as cabochons and as a building material.
Onyx VSI Shaper Crusher
The newly- developed VSI (vertical shaft impact crusher) crusher is a crusher and shaper. Can be used as a crusher or a shaper by changing feeding methods and core structure of the crushing cavity. Thus, customers do not need to expand investment; they have a crusher and a shaper in a same time.
Onyx VSI Shaper Crusher Application
VSI shaper widely applied in expressway and railway building, hydropower station construction, bridge and tunnel building, concrete batching plant, etc for crushing and gravel shaping. They are highly recommended when it comes to the shaping of gravels used in concrete aggregates, whose concrete strength is above C 60 or which required to be freeze proof and leak proof. In the fine crushing section, VSI is the substitute of impact crusher, and it is much better in terms of main performance indexes.
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