33 carat, SI1 average clarity and G color. Excellent compliments to the beautiful Heirloom certified Sapphire. He is a GIA Graduate Gemologist, Certified Master Gem cutter, retired senior charter member national association of gem and jewelry appraisers, instructor in gem identification, owner of two jewelry businesses and an appraisal business, instructor of grading and evaluation and he developed a defensible pricing structure for gemstones and jewelry.He began publishing The Michelsen Gemstone Index in 1983. The Michelsen Gemstone Index is a quarterly publication is currently accepted in more than 30 countries. Merritt Jewelry sells globally and wants to provide the most accurate value information available. Your local area may vary in value so let us know if we need to re evaluate for your area. 5000 Kelvin (White light used by all the major grading labs and appraisal organizations) is the lighting we use. Color will vary in gemstones if seen in other lights do to the yellows in the light. The item "Blue Sapphire Ring Filigree Antique 18K White Gold GIA Certified Heirloom $5,840" is in sale since Wednesday, October 2, 2019. This item is in the category "Jewelry & Watches\Fine Jewelry\Fine Rings\Gemstone". The seller is "merrittjewelry1" and is located in Newport Beach, California. This item can be shipped worldwide.