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Radiant|Lab Grown|IGI

1.72ct D SI1 Radiant Lab Grown Diamond

ID • D/SI1 • IGI LG629439991

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

Certificate IGI LG629439991

Diamond specifications and retailer prices

From HK$1,954 HKD
$249 USD
As of October 30, 2026
Save HK$8,717 HKD (82%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: HK$10,709 HKD at Rare Carat · As of October 18, 2026
View at Rare Carat

About this 1.72ct lab-grown radiant diamond

This 1.72ct lab-grown radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG629439991 or 629439991. Listed at 15 retailers as of October 30, 2026, with a 446% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.72
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.3°
Pavilion angle33.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG629439991
Dimensions8.76 × 5.89 × 3.93 mm
L/W Ratio1.49
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
8.76 mm5.89 mm1.72 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG629439991
Side View
Table 62.0%Crown 45.3°Girdle: MED-STKPavilion 33.8°Culet: NoneDepth 66.7%

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 30
Current: HK$10,709 HKD|Low: HK$1,875 HKD|High: HK$19,065 HKD|Avg: HK$5,964 HKD|-1.8%
Rare Carat
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
November 1, 2026
Retailer 13HK$1,954 HKD
Retailer 5HK$2,189 HKD
Retailer 3HK$2,267 HKD
Retailer 4HK$2,424 HKD
Retailer 14HK$2,424 HKD
Retailer 12HK$3,256 HKD
Retailer 9HK$4,350 HKD
Retailer 2HK$4,567 HKD
Retailer 6HK$4,951 HKD
Retailer 11HK$5,939 HKD
Retailer 15HK$7,783 HKD
Retailer 7HK$8,188 HKD
Retailer 10HK$9,715 HKD
Retailer 8HK$10,670 HKD
Rare CaratHK$10,709 HKD

43 data points across 15 retailers

15 retailersHK$1,954 HKD to HK$10,670 HKD

A
Cheapest Retailer
-
HK$1,954 HKD
$249 USD
A
Retailer 2
-
HK$2,189 HKD
$279 USD
View
Final sale: no returns
A
Retailer 3
-
HK$2,267 HKD
$289 USD
View
Retailer 4
-
HK$2,424 HKD
$309 USD
View
Price last confirmed 7 days ago
A
Retailer 5
-
HK$2,424 HKD
$309 USD
View
B+
Retailer 6
-
HK$3,256 HKD
$415 USD
View
B+
Retailer 7
-
HK$4,350 HKD
€528 EUR
View
A
Retailer 8
-
HK$4,567 HKD
£458 GBP
View
B+
Retailer 9
-
HK$4,951 HKD
$631 USD
View
B+
Retailer 10
-
HK$5,939 HKD
$757 USD
View
B
Retailer 11
-
HK$7,783 HKD
$992 USD
View
B
Retailer 12
-
HK$8,188 HKD
$1,044 USD
View
B
Retailer 13
-
HK$9,715 HKD
£975 GBP
View
B
Retailer 14
-
HK$10,670 HKD
$1,360 USD
View
Most Expensive
Rare Carat
6R629439991 · Oct 18
HK$10,709 HKD
$1,365 USD
View
Price last confirmed 14 days ago
14 more retailers have this diamond
Prices start from HK$1,954 HKDSave up to HK$8,717 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
1.72ct Radiant
HK$1,954 HKD