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1.28ct F SI1 Round Lab Grown Diamond

EX • F/SI1 • IGI LG788620074

Shape and cutting style on the report: Round brilliant

Certificate IGI LG788620074

Diamond specifications and retailer prices

From $308 NZD
As of November 5, 2026
Save $1,481 NZD (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,789 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG788620074 or 788620074. Listed at 15 retailers as of November 2, 2026, with prices from $308 to $1,789, a $1,481 spread on the same certified stone. MOH London lists it at $1,789. 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
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG788620074
Dimensions7.06 × 7.03 × 4.18 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.06 mm7.03 mm1.28 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG788620074
Side View
Table 61.0%Crown 33°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 59.3%

Caratlytics Score

How it works →
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: $1,789 NZD|Low: $308 NZD|High: $1,810 NZD|Avg: $887 NZD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 7$308 NZD
Retailer 8$382 NZD
Retailer 2$657 NZD
Retailer 4$673 NZD
Retailer 9$684 NZD
Retailer 5$830 NZD
Retailer 10$837 NZD
Retailer 6$972 NZD
Retailer 3$1,136 NZD
MOH London$1,789 NZD

42 data points across 10 retailers

15 retailers$308 NZD to $1,789 NZD

A
Cheapest Retailer
-
$308 NZD
A
Retailer 2
-
$357 NZD
View
A
Retailer 3
-
$382 NZD
View
Retailer 4
-
$382 NZD
View
Price last confirmed 13 days ago
A
Retailer 5
-
$657 NZD
View
A
Retailer 6
-
$673 NZD
View
B+
Retailer 7
-
$684 NZD
View
A
Retailer 8
-
$738 NZD
View
A
Retailer 9
-
$830 NZD
View
B+
Retailer 10
-
$837 NZD
View
B+
Retailer 11
-
$972 NZD
View
B+
Retailer 12
-
$1,136 NZD
View
B
Retailer 13
-
$1,230 NZD
View
B+
Retailer 14
-
$1,328 NZD
View
Most Expensive
B
MOH London
LG788620074 · Nov 2
$1,789 NZD
£781 GBP
View
14 more retailers have this diamond
Prices start from $308 NZDSave up to $1,481 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
$308 NZD