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8.31ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG595371329

Shape and cutting style on the report: Round brilliant

Certificate IGI LG595371329

Diamond specifications and retailer prices

From HK$9,046 HKD
$1,153 USD
As of November 1, 2026
Save HK$33,509 HKD (79%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: HK$42,555 HKD at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 8.31ct lab-grown round diamond

This 8.31ct lab-grown round sits in the over five carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG595371329 or 595371329. Listed at 14 retailers as of October 31, 2026, with prices from HK$9,046 to HK$42,555, a HK$33,509 spread on the same certified stone. Blue Nile lists it at HK$42,555. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

8.31
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG595371329
Dimensions13.00 × 12.92 × 7.98 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
13.00 mm12.92 mm8.31 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG595371329
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: HK$42,555 HKD|Low: HK$7,893 HKD|High: HK$42,555 HKD|Avg: HK$17,979 HKD
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 2, 2026
Retailer 8HK$8,842 HKD
Retailer 4HK$9,046 HKD
Retailer 9HK$9,156 HKD
Retailer 12HK$9,846 HKD
Retailer 17HK$10,498 HKD
Retailer 16HK$10,669 HKD
Retailer 11HK$11,847 HKD
Retailer 6HK$14,719 HKD
Retailer 2HK$15,018 HKD
Retailer 10HK$15,162 HKD
Retailer 5HK$16,664 HKD
Retailer 3HK$19,669 HKD
Retailer 13HK$20,681 HKD
Retailer 15HK$33,898 HKD
Retailer 14HK$37,432 HKD
Retailer 7HK$42,367 HKD
Blue NileHK$42,555 HKD

41 data points across 17 retailers

14 retailersHK$9,046 HKD to HK$42,555 HKD

A
Cheapest Retailer
-
HK$9,046 HKD
$1,153 USD
A
Retailer 2
-
HK$9,846 HKD
$1,255 USD
View
A
Retailer 3
-
HK$10,498 HKD
$1,338 USD
View
A
Retailer 4
-
HK$11,847 HKD
$1,510 USD
View
B+
Retailer 5
-
HK$14,719 HKD
$1,876 USD
View
B+
Retailer 6
-
HK$15,018 HKD
€1,823 EUR
View
B+
Retailer 7
-
HK$15,162 HKD
£1,522 GBP
View
B+
Retailer 8
-
HK$16,664 HKD
$2,124 USD
View
B+
Retailer 9
-
HK$19,669 HKD
$2,507 USD
View
B+
Retailer 10
-
HK$20,681 HKD
$2,636 USD
View
B
Retailer 11
-
HK$33,898 HKD
£3,402 GBP
View
B
Retailer 12
-
HK$37,432 HKD
$4,771 USD
View
B
Retailer 13
-
HK$42,367 HKD
$5,400 USD
View
Most Expensive
B
Blue Nile
25246920 · Oct 31
HK$42,555 HKD
$5,424 USD
View
13 more retailers have this diamond
Prices start from HK$9,046 HKDSave up to HK$33,509 HKD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
8.31ct Round
HK$9,046 HKD