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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 $476 NZD
$268 USD
As of November 1, 2026
Save $3,324 NZD (87%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $3,800 NZD at Helzberg Diamonds · As of November 1, 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 1, 2026, with prices from $476 to $3,800, a $3,324 spread on the same certified stone. Helzberg Diamonds lists it at $3,800. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $3,800 NZD|Low: $476 NZD|High: $4,497 NZD|Avg: $1,591 NZD
Helzberg Diamonds
Retailer 2
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Retailer 22
November 3, 2026
Retailer 9$476 NZD
Retailer 6$533 NZD
Retailer 13$544 NZD
Retailer 17$581 NZD
Retailer 3$590 NZD
Retailer 22$871 NZD
Retailer 16$938 NZD
Retailer 20$972 NZD
Retailer 10$979 NZD
Retailer 18$1,017 NZD
Retailer 5$1,040 NZD
Retailer 2$1,101 NZD
Retailer 4$1,267 NZD
Retailer 7$1,813 NZD
Retailer 12$1,896 NZD
Retailer 14$1,902 NZD
Retailer 8$1,987 NZD
Retailer 15$2,081 NZD
Retailer 21$2,377 NZD
Retailer 11$2,835 NZD
Retailer 19$3,146 NZD
Helzberg Diamonds$3,800 NZD

18 data points across 22 retailers

22 retailers$476 NZD to $3,800 NZD

A
Cheapest Retailer
-
$476 NZD
$268 USD
A
Retailer 2
-
$533 NZD
$300 USD
View
Final sale: no returns
A
Retailer 3
-
$544 NZD
$306 USD
View
A
Retailer 4
-
$581 NZD
$327 USD
View
Retailer 5
-
$590 NZD
$332 USD
View
Price last confirmed 8 days ago
A
Retailer 6
-
$871 NZD
$490 USD
View
A
Retailer 7
-
$938 NZD
£416 GBP
View
A
Retailer 8
-
$972 NZD
€521 EUR
View
A
Retailer 9
-
$979 NZD
$551 USD
View
A
Retailer 10
-
$1,017 NZD
ZAR 9,244 ZAR
View
A
Retailer 11
-
$1,040 NZD
$585 USD
View
A
Retailer 12
-
$1,101 NZD
£488 GBP
View
B+
Retailer 13
-
$1,267 NZD
$713 USD
View
B+
Retailer 14
-
$1,813 NZD
$1,020 USD
View
B
Retailer 15
-
$1,896 NZD
$1,067 USD
View
B
Retailer 16
-
$1,902 NZD
SGD 1,446 SGD
View
B
Retailer 17
-
$1,987 NZD
$1,118 USD
View
B
Retailer 18
-
$2,081 NZD
$1,171 USD
View
B+
Retailer 19
-
$2,377 NZD
£1,053 GBP
View
B
Retailer 20
-
$2,835 NZD
$1,595 USD
View
B
Retailer 21
-
$3,146 NZD
$1,770 USD
View
Most Expensive
B
Helzberg Diamonds
ZXZOKGMJLGLJ · Nov 1
$3,800 NZD
$2,138 USD
View
21 more retailers have this diamond
Prices start from $476 NZDSave up to $3,324 NZD

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
$476 NZD