What's the difference between black agate and onyx?
A semiprecious variety of chalcedony quartz that is a used often in jewelry. When chalcedony is variegated with spots or figures, or arranged in differently colored layers, it is called agate; and if by reason of the thickness, color, and arrangement of the layers it is suitable for being carved into cameos, it is called onyx. From a mineral or chemical standpoint they are almost identical, and f rom a fashion jewelry standpoint they are both great stones for pendants, rings, bracelets, and earrings. Checkout the Cocktail Hour collection by ELLE Jewelry to see more beautiful designer fashion. 20% off the entire collection, this includes all ! Click here to see stunning black agate & onyx silver fashion jewelry Visit InStyleSilverJewelry.com and follow us on Blogger , FaceBook , & Google+ Check out the site below to see more on gemstones. mineral site to look up stones. http://www.mindat