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Radiant|Lab Grown|IGI

1.28ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG816602405

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

Certificate IGI LG816602405

Diamond specifications and retailer prices

From $431 SGD
£265 GBP
As of November 2, 2026
Save $2,498 SGD (85%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $3,165 SGD at Rare Carat · As of October 18, 2026
View at Rare Carat

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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG816602405 or 816602405. Listed at 9 retailers as of November 2, 2026, with a 580% 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.8°
Pavilion angle39.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816602405
Dimensions7.74 × 5.26 × 3.72 mm
L/W Ratio1.47
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
7.74 mm5.26 mm1.28 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816602405
Side View
Table 62.0%Crown 38.8°Girdle: MediumPavilion 39.4°Culet: NoneDepth 70.7%

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: Nov 2
Current: $3,165 SGD|Low: $347 SGD|High: $4,208 SGD|Avg: $1,456 SGD|+5.4%
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
Retailer 16
Retailer 17
Retailer 18
November 2, 2026
Retailer 5$347 SGD
Retailer 10$391 SGD
Retailer 2$431 SGD
Retailer 15$638 SGD
Retailer 3$873 SGD
Retailer 7$983 SGD
Retailer 4$1,006 SGD
Retailer 18$1,068 SGD
Retailer 8$1,145 SGD
Retailer 14$1,223 SGD
Retailer 17$1,228 SGD
Retailer 16$1,407 SGD
Retailer 6$1,657 SGD
Retailer 11$1,676 SGD
Retailer 9$2,005 SGD
Retailer 12$2,571 SGD
Retailer 13$2,929 SGD
Rare Carat$3,165 SGD

22 data points across 18 retailers

9 retailers$431 SGD to $2,929 SGD

A+
Cheapest Retailer
-
$431 SGD
£265 GBP
A
Retailer 2
-
$638 SGD
$499 USD
View
B+
Retailer 3
-
$1,223 SGD
$956 USD
View
Retailer 4
-
$1,228 SGD
$960 USD
View
Price last confirmed 10 days ago
B+
Retailer 5
-
$1,407 SGD
$1,100 USD
View
B+
Retailer 6
-
$1,676 SGD
£1,032 GBP
View
B
Retailer 7
-
$2,571 SGD
$2,010 USD
View
B
Retailer 8
-
$2,929 SGD
$2,290 USD
View
Most Expensive
Rare Carat
PD-217234 · Oct 18
$3,165 SGD
$2,475 USD
View
Price last confirmed 15 days ago
8 more retailers have this diamond
Prices start from $431 SGDSave up to $2,498 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
$431 SGD