CaratHunter
Plans
Round|Lab Grown|IGI

1.28ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG818686822

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818686822

Diamond specifications and retailer prices

From $304 NZD
As of November 5, 2026
Save $1,460 NZD (83%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,764 NZD at MOH London · As of November 2, 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG818686822 or 818686822. Listed at 16 retailers as of November 2, 2026, with prices from $304 to $1,764, a $1,460 spread on the same certified stone. MOH London lists it at $1,764. 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
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818686822
Dimensions6.99 × 7.00 × 4.28 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
6.99 mm7.00 mm1.28 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818686822
Side View
Table 58.0%Crown 34.4°Girdle: MediumPavilion 41°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 5
Current: $1,764 NZD|Low: $292 NZD|High: $1,785 NZD|Avg: $828 NZD|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 6, 2026
Retailer 14$304 NZD
Retailer 15$352 NZD
Retailer 3$377 NZD
Retailer 4$377 NZD
Retailer 2$648 NZD
Retailer 11$664 NZD
Retailer 16$674 NZD
Retailer 12$756 NZD
Retailer 7$809 NZD
Retailer 6$825 NZD
Retailer 9$834 NZD
Retailer 13$959 NZD
Retailer 10$1,138 NZD
Retailer 5$1,213 NZD
Retailer 8$1,309 NZD
MOH London$1,764 NZD

34 data points across 16 retailers

16 retailers$304 NZD to $1,764 NZD

A
Cheapest Retailer
-
$304 NZD
A
Retailer 2
-
$352 NZD
View
Retailer 3
-
$377 NZD
View
Price last confirmed 12 days ago
A
Retailer 4
-
$377 NZD
View
A
Retailer 5
-
$648 NZD
View
A
Retailer 6
-
$664 NZD
View
B+
Retailer 7
-
$674 NZD
View
A
Retailer 8
-
$756 NZD
View
B+
Retailer 9
-
$809 NZD
View
B+
Retailer 10
-
$825 NZD
View
A
Retailer 11
-
$834 NZD
View
B+
Retailer 12
-
$959 NZD
View
B
Retailer 13
-
$1,138 NZD
View
B
Retailer 14
-
$1,213 NZD
View
B+
Retailer 15
-
$1,309 NZD
View
Most Expensive
B
MOH London
LG818686822 · Nov 2
$1,764 NZD
£781 GBP
View
15 more retailers have this diamond
Prices start from $304 NZDSave up to $1,460 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
$304 NZD