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Radiant|Lab Grown|IGI

1.71ct H SI1 Radiant Lab Grown Diamond

ID • H/SI1 • IGI LG512231580

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG512231580

Diamond specifications and retailer prices

From HK$8,552 HKD
$1,090 USD
As of October 31, 2026
Save HK$33,765 HKD (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: HK$42,317 HKD at MOH London · As of November 1, 2026
View at MOH London

About this 1.71ct lab-grown radiant diamond

This 1.71ct lab-grown radiant sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG512231580 or 512231580. Listed at 11 retailers as of October 31, 2026, with prices from HK$8,552 to HK$42,317, a HK$33,765 spread on the same certified stone. MOH London lists it at HK$42,317. 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

1.71
Carat
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle47.1°
Pavilion angle30.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG512231580
Dimensions7.68 × 5.82 × 4.03 mm
L/W Ratio1.32
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.68 mm5.82 mm1.71 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG512231580
Side View
Table 68.0%Crown 47.1°Girdle: ThickPavilion 30.1°Culet: NoneDepth 69.2%

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: Oct 31
Current: HK$42,317 HKD|Low: HK$8,552 HKD|High: HK$42,825 HKD|Avg: HK$21,995 HKD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 1, 2026
Retailer 2HK$8,552 HKD
Retailer 7HK$12,773 HKD
Retailer 11HK$13,895 HKD
Retailer 12HK$14,303 HKD
Retailer 8HK$14,821 HKD
Retailer 13HK$16,162 HKD
Retailer 5HK$16,294 HKD
Retailer 3HK$19,920 HKD
Retailer 9HK$23,286 HKD
Retailer 6HK$25,546 HKD
Retailer 10HK$27,774 HKD
MOH LondonHK$42,317 HKD
Retailer 4HK$42,427 HKD

18 data points across 13 retailers

11 retailersHK$8,552 HKD to HK$42,317 HKD

A
Cheapest Retailer
-
HK$8,552 HKD
$1,090 USD
B+
Retailer 2
-
HK$12,773 HKD
$1,628 USD
View
B+
Retailer 3
-
HK$13,895 HKD
$1,771 USD
View
B+
Retailer 4
-
HK$14,303 HKD
$1,823 USD
View
Final sale: no returns
Retailer 5
-
HK$14,821 HKD
$1,889 USD
View
Price last confirmed 20 days ago
B+
Retailer 6
-
HK$14,821 HKD
$1,889 USD
View
B+
Retailer 7
-
HK$16,162 HKD
$2,060 USD
View
B
Retailer 8
-
HK$23,286 HKD
$2,968 USD
View
B
Retailer 9
-
HK$25,546 HKD
$3,256 USD
View
B
Retailer 10
-
HK$27,774 HKD
$3,540 USD
View
Most Expensive
B
MOH London
LG512231580 · Nov 1
HK$42,317 HKD
£4,247 GBP
View
10 more retailers have this diamond
Prices start from HK$8,552 HKDSave up to HK$33,765 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
1.71ct Radiant
HK$8,552 HKD