This is Victorian circa 1860 and is bezel set with 6 natural emeralds. The cross is a cross with rays coming from the center. The bale seems to be a replacement.
Emerald Facts:
Emeralds belong to the mineral family of beryl bearing good hardness graded 7 to 8 on Mohs' scale of hardness, owing their intense green color to the elements of chromium and vanadium.
The mining of Emeralds has been dated back to more than 3,000 years ago, during the time of the Ancient Egyptian Empire. Emerald bracelets, Emerald earrings and Emerald rings have all been worn and sought after since ancient times.

The "green fire" was so mesmerizing and highly valued in the courts of Europe that the Spanish Conquistadors went on a bloody campaign to find the location of the emerald mines in South America. Emerald green is the color of life and of eternally returning spring. For centuries, however, it has also been the color of beauty and of eternal love. Even in ancient Rome green was the color dedicated to Venus, goddess of love and beauty. Today there are still many cultures and religions where green holds a special position. Splendid Emerald green is a color communicating harmony, love of nature and a primeval joy of life. You cannot ever get too much of this unique color, as Pliny already pointed out "Green is pleasant to the eye without tiring it.”. Green is characterized as fresh and full of life, never as monotonous, Emerald green in all its hues and shades will preserve its vivid energy. Emeralds were used in the Middle Ages to foretell the future; emerald also guarded against evil spirits and was believed to cure a range of ailments from poor eyesight to infertility. Historically, emerald has been closely associated with love, since the ancient Romans dedicated this gem to Venus. Emerald has also signified hope, new growth and eternal life since it is the "color of spring." In fact, the French refer to the natural inclusions in emeralds as "jardin," French for "garden. . . Emeralds mean “Success in Love” in the Victorian Language of Gems.
The size of the cross is 1 ½ inches tall and ¾ inches wide. It was worn with a ribbon originally but comes with a new chain. This is in excellent condition