Material: Genuine Sterling Silver (925 silver, 92.5% silver content) Stone(s): Genuine amethyst, peridot, citrine and blue topaz (23 x 23 mm) Overall Dimension (including bail): 1.4 x 0.9 x 0.25 inches Inner Bail Diameter: 5 mm Weight: 9.4 grams Stamp/Mark: 925 Serial Number: p29868 Citrine is quartz generally occurring in a golden color. Citrine occurs naturally in Scotland and in the Ural Mountains of Russia. Much citrine available today is actually smoky quartz or amethyst that has been heat-treated to achieve its characteristic color. Spring green peridot is the gem variety of ovaline, a silicate mineral thought to be common in the upper mantle of Earth's crust. Peridot-grade ovaline is most abundant in Pakistan and other dry areas. Used as early as 1580 BC in Egypt, peridot is held as a symbol of the Sun. Derived from "tapaz," the Sanskrit word for fire, topaz is one of the most brilliant cut gemstones in existence. Topaz comes in a variety of colors from yellow to blue, and deeper blues and pinks are often created by heat-treating stones. Brazil is the world's top exporter of topaz.