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1.28ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG757504797

Shape and cutting style on the report: Round brilliant

Certificate IGI LG757504797

Diamond specifications and retailer prices

From $740 NZD
As of November 5, 2026
Save $1,237 NZD (63%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $1,977 NZD at MOH London · As of November 5, 2026
View at MOH London

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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG757504797 or 757504797. Listed at 6 retailers as of November 5, 2026, with prices from $740 to $1,977, a $1,237 spread on the same certified stone. MOH London lists it at $1,977. 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 angle33.2°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG757504797
Dimensions7.02 × 6.98 × 4.24 mm
L/W Ratio1.01
Girdle conditionFaceted
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
7.02 mm6.98 mm1.28 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG757504797
Side View
Table 59.0%Crown 33.2°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 60.5%

Caratlytics Score

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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 5
Current: $1,977 NZD|Low: $690 NZD|High: $1,988 NZD|Avg: $951 NZD|+0.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 6$713 NZD
Retailer 7$740 NZD
Retailer 4$742 NZD
Retailer 2$761 NZD
Retailer 5$845 NZD
Retailer 3$866 NZD
MOH London$1,977 NZD

29 data points across 7 retailers

6 retailers$740 NZD to $1,977 NZD

A
Cheapest Retailer
-
$740 NZD
A
Retailer 2
-
$742 NZD
View
A
Retailer 3
-
$761 NZD
View
Retailer 4
-
$845 NZD
View
Price last confirmed 30 days ago
B+
Retailer 5
-
$866 NZD
View
Most Expensive
B
MOH London
LG757504797 · Nov 5
$1,977 NZD
£875 GBP
View
5 more retailers have this diamond
Prices start from $740 NZDSave up to $1,237 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
$740 NZD