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Onyx is an Uparatna (Secondary gemstone), for the Lord Budh (Mercury). which is the best alternative gemstone to Emerald ruled by Mercury. Onyx has a special affinity with Leo, and lesser with Aquarius, Pisces, Cancer and Libra.
ONYX gemstone is a type of Chalcedony which has parallel banded layers. The colors of Onyx gemstone range from white to many other shades like black, blue, green, red, honey etc. The various varieties of Onyxes are used for Astrological as well as healing purposes.
Some of benefits of Onyx stone are: Brings spiritual inspiration. Helps to keep emotions control. Eliminates negative thinking and stress, Sharpens thinking.
Onyx deposits are found in countries all over the world, including Argentina, Australia, Brazil, India, Botswana, Madagascar, Mexico, Myanmar (Burma), Pakistan, Sri Lanka, Uruguay and the USA.