This is a very nice facetted Peridot Olivine (a variety of Forsterite) "Evening Emerald" stud earrings set in sterling silver with CZ.
It is in great condition, and has natural, untreated color.
Chemically, Peridot ((transparent gem variety of Olivine)) is an iron magnesium silicate and its intensity of colour depends on the amount of iron it contains. The best colors of peridot generally contain about 10-15% of iron.
Peridot serves as a birthstone for the month of August.
Location: Sapat Gali, Naran, Kaghan Valley, Mansehra District, Khyber Pakhtunkhwa Province, Pakistan
Size: 1.5 Centimeters long; stones 0.8 x 0.5 Centimeters each
Weight: 2.87 Grams total