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Heart|Lab Grown|IGI

1.28ct E SI1 Heart Lab Grown Diamond

ID • E/SI1 • IGI LG752551204

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG752551204

Diamond specifications and retailer prices

From $330 NZD
As of November 6, 2026
Save $1,723 NZD (84%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $2,053 NZD at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

About this 1.28ct lab-grown heart diamond

This 1.28ct lab-grown heart sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG752551204 or 752551204. Listed at 18 retailers as of November 6, 2026, with prices from $330 to $2,053, a $1,723 spread on the same certified stone. Reve Diamonds lists it at $2,053. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.28
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.9°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG752551204
Dimensions7.49 × 6.58 × 4.49 mm
L/W Ratio1.14
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.49 mm6.58 mm1.28 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG752551204
Side View
Table 62.0%Crown 37.9°Girdle: MED-THKPavilion 40.3°Culet: NoneDepth 59.9%

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 6
Current: $729 NZD|Low: $316 NZD|High: $2,056 NZD|Avg: $830 NZD|+3.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 11$330 NZD
Retailer 10$368 NZD
Retailer 2$382 NZD
Retailer 3$408 NZD
Retailer 12$408 NZD
Retailer 5$550 NZD
Retailer 1$729 NZD
Retailer 4$859 NZD
Retailer 8$911 NZD
Retailer 7$972 NZD
Retailer 13$1,313 NZD
Retailer 9$1,551 NZD
Retailer 6$1,903 NZD

45 data points across 13 retailers

18 retailers$330 NZD to $2,053 NZD

A
Cheapest Retailer
-
$330 NZD
A
Retailer 2
-
$368 NZD
View
Final sale: no returns
A
Retailer 3
-
$382 NZD
View
A
Retailer 4
-
$408 NZD
View
Retailer 5
-
$408 NZD
View
Price last confirmed 12 days ago
B+
Retailer 6
-
$550 NZD
View
A
Retailer 7
-
$729 NZD
View
B+
Retailer 8
-
$796 NZD
View
B+
Retailer 9
-
$859 NZD
View
B+
Retailer 10
-
$911 NZD
View
B+
Retailer 11
-
$972 NZD
View
Retailer 12
-
$1,034 NZD
View
Price last confirmed 11 days ago
B
Retailer 13
-
$1,313 NZD
View
B
Retailer 14
-
$1,331 NZD
View
B
Retailer 15
-
$1,411 NZD
View
B
Retailer 16
-
$1,551 NZD
View
B
Retailer 17
-
$1,903 NZD
View
Most Expensive
B
Reve Diamonds
6E563C587 · Nov 6
$2,053 NZD
$1,138 USD
View
17 more retailers have this diamond
Prices start from $330 NZDSave up to $1,723 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 Heart
$330 NZD