Instruction: Given the title, description, feature, price, and brand of a product and a set of target attributes, extract the value of each target attribute from the product information. Output the extracted value and the corresponding source (e.g., title or feature) denoting where the value is extracted.

Input:
Product title: Peora Created Black Opal Halo Ring Sterling Silver 1.00 Carats Sizes 5 to 9
Product description: Featured Stone: 1-piece Blazing Black Created Opal, Round-cut Cabochon sized at 7mm; 1.00 Carats Total Weight; Accent Stones: 72 pcs White Cubic Zirconia; Ring: 2.5 grams Sterling Silver with .925 Stamp. Available in Sizes 5 to 9. Watch her eyes sparkle when you celebrate her birthday with a gift of the Versailles Halo Ring. Featuring a beautiful Created Blazing Black Opal with rich luminescence of red, amber and green. Mounted in a halo-style, Cubic Zirconia-accented Sterling Silver, this ring is not only elegant but timeless. Opal is Octobers birthstone. Its also a wonderful gift for just about any occasion such as Mothers Day, Valentines Day, Graduation, Christmas, and Anniversaries. This is also an ideal gift for bridesmaids, flower girls, and other members of your wedding party. The ring showcases an exquisite design with outstanding craftsmanship, and boasts a no-tarnish Rhodium finish. Signature gift box included with purchase. Style SR11270.
Product feature: Lab Created Opal, Black Color, Round Cut Cabochon, .925 Sterling Silver, Exclusive Craftsmanship and Styling, Includes Gift Packaging, 30 Day Return/Exchange Policy, Shipping Information: View shipping rates and policies, ASIN: B011LPUT0S, Item model number: SR11270, Date first listed on Amazon: July 14, 2015, Average Customer Review: 3.6 out of 5 stars 3 customer reviews
Target attributes: Silhouette
Answer: attribute: silhouette
value: None
source: None