August 18, 20 10 (released on August10)

Gia report: 1 126496736 (report of American Gemological Institute)

Inscription registration office: GIA 1 126496736 (the stamp number should be engraved on the diamond waist).

Round bright cut (round bright cut)

6.38-6.42*4.0 1 mm (diamond size, minimum diameter 6.38 mm, maximum diameter 6.42 mm, height 4.0 1 mm)

Carat weight: 1.0 1 carat (carat weight)

Color: g (color)

Cleanliness: VVS 1 (cleanliness)

Cut: excellent (cut: excellent)

Total depth: 62.7%(GIA standard is 56.8-62.4% for good-excellent).

Table size: 56% (table width ratio, GIA standard 52.5%-58.4% is excellent).

Crown angle: 36.5 (crown angle)

Crown height: 16.0% (crown height)

Pavilion angle: 40.8 degrees (pavilion angle)

Pavilion depth: 43.0% (pavilion depth)

Star length: 50% (star lobe length)

Lower half: 80% (lower facet)

Female: thin to medium, with a face (3.5%) (waist thickness: medium thin, with a face)

Culet: none (bottom tip: no, because of GIA's vague standard of bottom tip, we can't judge what bottom tip it is)

Polishing: Excellent (Polishing: Excellent)

Symmetry: excellent (symmetry: excellent)

Fluorescence: none (fluorescence: none)

Remarks: None (Note: None)

The key of symbol: accurate positioning

1 carat, g color, VVS 1, 3E, and the market price is between 65,000 and 70,000. The price will rise by 20% or more after mosaic. So the valuation is more than 80,000.

Supplementary answer:

1. The waist is moderately thin, no problem. The ideal waistline is between' thin' and' slightly thick'.

2. Why is the overall depth ratio of 62.7% out of range, and the cutting is still excellent? The total depth ratio is the ratio of the total height to the diameter. The formula for calculating the depth ratio of this GIA 1 126496736 diamond is 4.01mm× 2×100%/(6.38 mm+6.42 mm) = 62.65625%, which exceeds the requirements for perfect cutting of round bright diamonds. When the aspect ratio of the diamond is too large, the light will be transmitted from the pavilion surface or the lower waist surface, and the fire color is not ideal. It is said that GIA in Taiwan Province Province and Hongkong will be appraised by local grading agencies when buying diamonds. However, the local appraisal agency may falsely report the cut, clarity and color, and send the data back to the GIA headquarters in the United States, and then the GIA certificate will be sent to Hongkong and Taiwan Province, so it is also possible that the classification is not strict. This is particularly likely when diamonds sold in Taiwan Province Province are accompanied by GIA certificates. The width ratio of the table did not reach the excellent standard, but the cutting was 3E.

3.GIA's description of the bottom tip of a diamond has always been vague. Culet: None does not appear, but it is not stated whether the bottom tip is sharp, worn or notched. International Gemological Institute (IGI) or Diamond High Conference (HRD) will introduce the bottom tip in detail. An open bottom tip shows mediocre cutting. If the facet of the bottom tip is large, it will be obvious from the table.

The waist of this diamond is multifaceted, and the cutter still spent a lot of extra effort to finish the work. He really works hard. Not all diamonds can enjoy this treatment at the waist.

5. Suggestion: Don't dwell on such details. As jewelry and general collection, it is still very exciting. The inlay process will also have a great influence on the appearance and comfort of the ring. If you want to wear it at ordinary times, you can set a small diamond on the ring arm or around the main stone.