Onyx name is derived from a Greek word, "onyx" which means nail. Onyx is available in a wide number of colors and is also marked by immense popularity. But the most popular and expensive one is a black onyx which is used to make beautiful jewelries. Black Onyx is known for the cross section of white layers which become prominent if the body of the stone is black. This gives it a unique look from outside. They are also known as 'zebra agate'. It is easily found in every type of quartz. Onyx is available in a wide number of colors and is also marked by immense popularity. But the most popular and expensive one is a black onyx which is used to make beautiful jewelries. Black Onyx is known for the cross section of white layers which become prominent if the body of the stone is black. This gives it a unique look from outside. They are also known as 'zebra agate'. It is easily found in every type of quartz. The most commonly found onyx is white or brown in color. It is also known as Sardonyx. They are highly popular mainly because of the good amount of seals found in them which are known to be non-sticky. Onyx is also popular because of the great quality of luster that it generates. Onyx jewelry can offer its wearer protection by deflecting negativity and releasing negative emotions. Black stones like onyx jewelry are known for having protective energy, as black allows no light to pass through it and can therefore be used as cloak against negative forces. Besides this, black onyx jewelry can improve your self confidence, sharpen your wit and enhance your will power.