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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 $267 SGD
$209 USD
As of October 27, 2026
Save $2,865 SGD (91%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $3,132 SGD 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 October 27, 2026, with prices from $267 to $3,132, a $2,865 spread on the same certified stone. Brilliant Earth lists it at $3,132. 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+
Exceptional
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 27
Current: $3,132 SGD|Low: $267 SGD|High: $3,234 SGD|Avg: $1,325 SGD|-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
October 30, 2026
Retailer 14$267 SGD
Retailer 12$300 SGD
Retailer 7$311 SGD
Retailer 5$406 SGD
Retailer 3$453 SGD
Retailer 8$591 SGD
Retailer 10$703 SGD
Retailer 2$839 SGD
Retailer 13$893 SGD
Retailer 17$965 SGD
Retailer 6$1,138 SGD
Retailer 4$1,176 SGD
Retailer 11$1,415 SGD
Retailer 15$1,469 SGD
Retailer 9$2,499 SGD
Retailer 16$2,570 SGD
Brilliant Earth$3,132 SGD

33 data points across 17 retailers

16 retailers$267 SGD to $3,132 SGD

A+
Cheapest Retailer
-
$267 SGD
$209 USD
A
Retailer 2
-
$300 SGD
$235 USD
View
Final sale: no returns
A
Retailer 3
-
$311 SGD
$243 USD
View
A
Retailer 4
-
$406 SGD
$317 USD
View
B+
Retailer 5
-
$453 SGD
$354 USD
View
Retailer 6
-
$591 SGD
€440 EUR
View
Price last confirmed 7 days ago
A
Retailer 7
-
$839 SGD
$656 USD
View
A
Retailer 8
-
$893 SGD
A$1,075 AUD
View
A
Retailer 9
-
$965 SGD
$755 USD
View
B+
Retailer 10
-
$1,138 SGD
$890 USD
View
B+
Retailer 11
-
$1,176 SGD
$920 USD
View
B+
Retailer 12
-
$1,415 SGD
$1,107 USD
View
B+
Retailer 13
-
$1,469 SGD
£905 GBP
View
Retailer 14
-
$2,499 SGD
$1,955 USD
View
Price last confirmed 11 days ago
B
Retailer 15
-
$2,570 SGD
$2,010 USD
View
Most Expensive
B
Brilliant Earth
21405859Y · Oct 28
$3,132 SGD
$2,450 USD
View
15 more retailers have this diamond
Prices start from $267 SGDSave up to $2,865 SGD

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
$267 SGD