onyx stone

Agate is a form of cryptocrystalline quartz. The colors of the bands, ranging from white to almost every aspect (except for some shades, such as purple or blue). Usually, containing samples of agate available bands of colors white, tan, and brown. Entertainment 

Sardonyx is the alternative that colored bands and agricultural development and rural (shades of red) rather than black. Black Opal is pure common, and perhaps the most famous variety, but not as common as garnet color ranges.
 Tradition
And sometimes the name of the user, incorrectly, to label ranges Jeweler other materials, such as ranges calcite found in Mexico, Pakistan, and other places, and carved in many cases, polished, and sold it. This material is much lighter than the garnet real, and so much more readily available. Most of the items that are sold sculpture as 'Garnet' Today this carbonate material. 

Etymology
Garnet comes through the Latin: onyx, garnet ὄνυξ Greek meaning of the clutch 'or' nail. With color fleshtone, onyx can be said to resemble a nail. Spike the English word 'is cognate with the Greek word.
 The historical use Onyx from Australia. Onyx from Brazil.
Has a long history of using hardstone carving and jewelry, which is usually cut as a cabochon, or beads, and is also used to screen or pattern engraved gems, where bands make the image contrast with the ground. Some onyx is natural but is producing a lot of staining of agate.
Onyx was known to the Greeks and Romans used sardonyx appears in the art of Minoan Crete, in particular of the amounts recovered in the archaeological Knossos.Onyx were used in Egypt, where the making of the early Second Dynasty pots and other items. Black onyx with bands of colors. 

As mentioned in the Bible alarmed at different points, such as clothing the priests and the foundation of the city from the sky in Revelation.