by Elsa2006 » May 27, 2019 Hello everyone, I am new to this forum and certainly a novice regarding diamond properties. My husband and I are in the process of updating my mined engagement diamond to a round ideal cut lab grown diamond. There are a few things I am nervous/anxious about in this process. I am working with a local jeweler who frequently brings in loose diamonds to look at. Within my budget, cut/optical performance is most important to me. Unfortunately, all of the loose diamonds so far have been IGI graded so no scope images for evaluating optical performance. I just purchased a ASET scope from Pricescope and I hope I can use it efficiently. This week I will see the following diamond (IGI Report 341802157; please see below) that I am cautiously interested in. It has a HCA score of 1.5. Here are the specific points I am uncertain about prior to seeing it in person. (1) Online resources suggest that IGI-Antwerp grading is typically inflated. If this diamond is beautiful in terms of light return, do you recommend sending it to GIA for an independent grading before final purchase decision? (2) The pavilion angle is at the upper limit for ideal proportion (40.9°)--not sure how this will translate to optical performance when combined with the crown angle (34.5°). I like broad flashes of white light (brilliance) more than colored sparkle (dispersion). (3) The polish is "very good" (not excellent). How likely is this expected to interfere with light return? Or how is this expected to impact the visual beauty of the diamond (unaided eye)? (4) There are 3 cloud inclusions near the girdle. Are cloud inclusions generally bad for light return? Your expertise is highly appreciated and thank you in advance! REPORT NUMBER: LG_341802157 REPORT CITY, DATE: ANTWERP, November 25, 2018 DESCRIPTION: LABORATORY GROWN DIAMOND SHAPE AND CUT: ROUND BRILLIANT CARAT WEIGHT: 3.03 Carats COLOR GRADE: F CLARITY GRADE: VS 2 CUT GRADE: IDEAL POLISH: VERY GOOD SYMMETRY: EXCELLENT Measurements: 9.28 - 9.33 x 5.72 mm Table Size: 56.5% Total Depth: 61.5% Crown Height/Angle: 15% - 34.5° Pavilion Depth/Angle: 43% - 40.9° Girdle Thickness: MEDIUM TO SLIGHTLY THICK (FACETED) Culet: POINTED FLUORESCENCE: NONE Holloway Cut Advisor™ Light Return: Excellent Fire: Excellent Scintillation: Very Good Spread: Very Good HCA Score : 1.5 - Excellent - within TIC range Looks Like size For more info Should sparkle beautifully and look a good size for its carat weight. Confirm with an Ideal-scope, ASET scope or send to an appraiser.