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Round|Lab Grown|IGI

1.28ct F FL Round Lab Grown Diamond

ID • F/FL • IGI LG840635053

Shape and cutting style on the report: Round brilliant

Certificate IGI LG840635053

Diamond specifications and retailer prices

From $337 SGD
As of November 3, 2026
Save $2,395 SGD (88%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $2,732 SGD at Helzberg Diamonds · As of November 4, 2026
View at Helzberg Diamonds

About this 1.28ct lab-grown round diamond

This 1.28ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG840635053 or 840635053. Listed at 22 retailers as of November 3, 2026, with prices from $337 to $2,732, a $2,395 spread on the same certified stone. Helzberg Diamonds lists it at $2,732. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
F
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.1°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840635053
Dimensions6.96 × 7.00 × 4.27 mm
L/W Ratio1.01
Girdle conditionFaceted
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
6.96 mm7.00 mm1.28 ctF / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840635053
Side View
Table 55.0%Crown 33.1°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.2%

Caratlytics Score

How it works →
A
Excellent
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 3
Current: $2,732 SGD|Low: $337 SGD|High: $3,233 SGD|Avg: $1,134 SGD
Helzberg Diamonds
Retailer 2
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Retailer 22
November 5, 2026
Retailer 21$337 SGD
Retailer 16$377 SGD
Retailer 5$391 SGD
Retailer 6$418 SGD
Retailer 11$424 SGD
Retailer 19$620 SGD
Retailer 13$672 SGD
Retailer 17$695 SGD
Retailer 9$699 SGD
Retailer 7$731 SGD
Retailer 12$748 SGD
Retailer 2$790 SGD
Retailer 20$909 SGD
Retailer 22$1,284 SGD
Retailer 4$1,343 SGD
Retailer 14$1,367 SGD
Retailer 3$1,408 SGD
Retailer 15$1,496 SGD
Retailer 10$1,709 SGD
Retailer 18$1,834 SGD
Retailer 8$2,262 SGD
Helzberg Diamonds$2,732 SGD

20 data points across 22 retailers

22 retailers$337 SGD to $2,732 SGD

A
Cheapest Retailer
-
$337 SGD
A
Retailer 2
-
$377 SGD
View
Final sale: no returns
A
Retailer 3
-
$391 SGD
View
A
Retailer 4
-
$418 SGD
View
Retailer 5
-
$424 SGD
View
Price last confirmed 11 days ago
A
Retailer 6
-
$620 SGD
View
A
Retailer 7
-
$672 SGD
View
A
Retailer 8
-
$695 SGD
View
A
Retailer 9
-
$699 SGD
View
A
Retailer 10
-
$731 SGD
View
A
Retailer 11
-
$748 SGD
View
A
Retailer 12
-
$790 SGD
View
B+
Retailer 13
-
$909 SGD
View
B+
Retailer 14
-
$1,284 SGD
View
B+
Retailer 15
-
$1,343 SGD
View
B
Retailer 16
-
$1,367 SGD
View
B+
Retailer 17
-
$1,408 SGD
View
B
Retailer 18
-
$1,496 SGD
View
Retailer 19
-
$1,709 SGD
View
Price last confirmed 7 days ago
B
Retailer 20
-
$1,834 SGD
View
B
Retailer 21
-
$2,262 SGD
View
Most Expensive
B
Helzberg Diamonds
ZXZOKGMJLGLJ · Nov 4
$2,732 SGD
$2,138 USD
View
21 more retailers have this diamond
Prices start from $337 SGDSave up to $2,395 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 Round
$337 SGD