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1.28ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG792617959

Shape and cutting style on the report: Round brilliant

Certificate IGI LG792617959

Diamond specifications and retailer prices

From $589 NZD
As of November 5, 2026
Save $1,618 NZD (73%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $2,207 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 LG792617959 or 792617959. Listed at 8 retailers as of November 5, 2026, with prices from $589 to $2,207, a $1,618 spread on the same certified stone. MOH London lists it at $2,207. 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 angle34.8°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG792617959
Dimensions6.97 × 7.00 × 4.26 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.97 mm7.00 mm1.28 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG792617959
Side View
Table 60.0%Crown 34.8°Girdle: MediumPavilion 41°Culet: NoneDepth 60.9%

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 5
Current: $2,207 NZD|Low: $566 NZD|High: $2,223 NZD|Avg: $1,177 NZD|+14.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 3$589 NZD
Retailer 4$818 NZD
Retailer 7$849 NZD
Retailer 2$1,037 NZD
Retailer 5$1,067 NZD
Retailer 8$1,475 NZD
Retailer 6$2,078 NZD
MOH London$2,207 NZD

32 data points across 8 retailers

8 retailers$589 NZD to $2,207 NZD

A
Cheapest Retailer
-
$589 NZD
B+
Retailer 2
-
$818 NZD
View
B+
Retailer 3
-
$849 NZD
View
B
Retailer 4
-
$1,037 NZD
View
B
Retailer 5
-
$1,067 NZD
View
B
Retailer 6
-
$1,475 NZD
View
B
Retailer 7
-
$2,078 NZD
View
Most Expensive
B
MOH London
LG792617959 · Nov 5
$2,207 NZD
£977 GBP
View
7 more retailers have this diamond
Prices start from $589 NZDSave up to $1,618 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
$589 NZD