Sterling Silver 3-Carat Citrine Oval Ring SIZE 7.5Material: Genuine Sterling Silver (925 silver, 92. 5% silver content) Stone(s): Genuine citrine, 3 carats Ring Face Dimension: 0. 6 x 0. 4 x 0. 25 inches Weight: 5. 6 grams Ring Size (US): 7. 5 Stamp Mark: 925 Serial Number: r27624 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