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Radiant|Lab Grown|IGI

1.28ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG731537069

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

Certificate IGI LG731537069

Diamond specifications and retailer prices

From HK$1,844 HKD
As of November 4, 2026
Save HK$14,005 HKD (88%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: HK$19,222 HKD at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 1.28ct lab-grown radiant diamond

This 1.28ct lab-grown radiant sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG731537069 or 731537069. Listed at 16 retailers as of November 4, 2026, with a 760% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41°
Pavilion angle34.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG731537069
Dimensions7.61 × 5.54 × 3.54 mm
L/W Ratio1.37
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
7.61 mm5.54 mm1.28 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG731537069
Side View
Table 67.0%Crown 41°Girdle: Slightly ThickPavilion 34.7°Culet: NoneDepth 63.9%

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 4
Current: HK$19,222 HKD|Low: HK$1,530 HKD|High: HK$19,850 HKD|Avg: HK$7,391 HKD|-3.2%
Brilliant Earth
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 4, 2026
Retailer 16HK$1,640 HKD
Retailer 14HK$1,844 HKD
Retailer 7HK$1,907 HKD
Retailer 5HK$2,487 HKD
Retailer 3HK$2,777 HKD
Retailer 8HK$3,625 HKD
Retailer 2HK$4,268 HKD
Retailer 12HK$5,147 HKD
Retailer 15HK$5,476 HKD
Retailer 17HK$5,924 HKD
Retailer 6HK$6,983 HKD
Retailer 4HK$7,218 HKD
Retailer 13HK$8,677 HKD
Retailer 10HK$9,070 HKD
Retailer 9HK$15,339 HKD
Retailer 11HK$15,849 HKD
Brilliant EarthHK$19,222 HKD

37 data points across 17 retailers

16 retailersHK$1,844 HKD to HK$15,849 HKD

Retailer 1
-
HK$1,640 HKD
Price last confirmed 8 days ago
A
Retailer 2
-
HK$1,844 HKD
View
Final sale: no returns
Retailer 3
-
HK$1,907 HKD
View
Price last confirmed 7 days ago
A
Retailer 4
-
HK$2,487 HKD
View
B+
Retailer 5
-
HK$2,777 HKD
View
A
Retailer 6
-
HK$4,268 HKD
View
A
Retailer 7
-
HK$5,147 HKD
View
Retailer 8
-
HK$5,476 HKD
View
Price last confirmed 8 days ago
Retailer 9
-
HK$5,924 HKD
View
Price last confirmed 9 days ago
Retailer 10
-
HK$6,983 HKD
View
Price last confirmed 8 days ago
Retailer 11
-
HK$7,218 HKD
View
Price last confirmed 10 days ago
B+
Retailer 12
-
HK$8,677 HKD
View
B+
Retailer 13
-
HK$9,070 HKD
View
Retailer 14
-
HK$15,339 HKD
View
Price last confirmed 17 days ago
B
Retailer 15
-
HK$15,849 HKD
View
Most Expensive
Brilliant Earth
21405859Y · Oct 28
HK$19,222 HKD
$2,450 USD
View
Price last confirmed 7 days ago
15 more retailers have this diamond
Prices start from HK$1,844 HKDSave up to HK$14,005 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
1.28ct Radiant
HK$1,844 HKD