Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Horse Ring Sterling Silver 925 Genuine Turquoise & Gemstones (SELECT Color)
Product description: Gorgeous horse ring in solid sterling silver and genuine gemstones. Amazing craftsmanship. Trendy but with a touch of Southwest flair that is always exciting!, Gemstones include Turquoise, Purple Turquoise, Spiny Oyster, Black Shell and Lab-Created Opal., NOTE: Due to the nature of these gemstones, variations in colors/shades/matrix and imperfections are normal. Our turquoise has been stabilized, treated, and color-enhanced for beauty and durability. Satisfaction always guaranteed., Imported, Turquoise Network is a proud member of the Gemological Institute of America (GIA), European Gemological Laboratories (EGL), and Better Business Bureau (A+ Rated).
Product feature: 925 Sterling Silver (Solid), Genuine Turquoise, Spiny Oyster, Purple Turquoise (natural turquoise that has been treated & color-enhanced), See ruler image for dimensions, Premium Quality | Imported, Turquoise Network: Fine jewelry at UNBELIEVABLE low prices! Accredited member of the Better Business Bureau (A+ Rated), Package Dimensions: 6 x 3.3 x 1 inches, Shipping Weight: 0.8 ounces, ASIN: B013GZKYWY, Item model number: R2018, Date first listed on Amazon: November 12, 2017, Average Customer Review: 4.9 out of 5 stars 52 customer reviews
Product brand: Turquoise Network
Target attributes: Silhouette
Answer: attribute: silhouette
value: None
source: None