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Oval|Lab Grown|IGI

1.28ct F SI1 Oval Lab Grown Diamond

ID • F/SI1 • IGI LG729580171

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG729580171

Diamond specifications and retailer prices

From $295 NZD
$166 USD
As of November 1, 2026
Save $1,414 NZD (83%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,709 NZD at MOH London · As of November 1, 2026
View at MOH London

About this 1.28ct lab-grown oval diamond

This 1.28ct lab-grown oval 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 LG729580171 or 729580171. Listed at 12 retailers as of November 1, 2026, with prices from $295 to $1,709, a $1,414 spread on the same certified stone. MOH London lists it at $1,709. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG729580171
Dimensions9.06 × 6.11 × 3.68 mm
L/W Ratio1.48
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.06 mm6.11 mm1.28 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG729580171
Side View
Table 61.0%Crown 32°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 60.2%

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 1
Current: $1,709 NZD|Low: $295 NZD|High: $2,364 NZD|Avg: $941 NZD|-0.5%
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 2, 2026
Retailer 11$295 NZD
Retailer 4$341 NZD
Retailer 12$366 NZD
Retailer 15$409 NZD
Retailer 2$474 NZD
Retailer 9$648 NZD
Retailer 16$659 NZD
Retailer 5$694 NZD
Retailer 14$798 NZD
Retailer 13$814 NZD
Retailer 3$1,175 NZD
Retailer 10$1,241 NZD
Retailer 7$1,246 NZD
Retailer 6$1,644 NZD
MOH London$1,709 NZD
Retailer 8$2,364 NZD

7 data points across 16 retailers

12 retailers$295 NZD to $1,709 NZD

A
Cheapest Retailer
-
$295 NZD
$166 USD
A
Retailer 2
-
$341 NZD
$192 USD
View
A
Retailer 3
-
$366 NZD
$206 USD
View
A
Retailer 4
-
$409 NZD
HK$1,800 HKD
View
A
Retailer 5
-
$474 NZD
£210 GBP
View
A
Retailer 6
-
$648 NZD
£287 GBP
View
B+
Retailer 7
-
$659 NZD
$371 USD
View
B+
Retailer 8
-
$798 NZD
$449 USD
View
B+
Retailer 9
-
$814 NZD
$458 USD
View
B
Retailer 10
-
$1,175 NZD
$661 USD
View
B
Retailer 11
-
$1,241 NZD
$698 USD
View
Most Expensive
B
MOH London
LG729580171 · Nov 1
$1,709 NZD
£757 GBP
View
11 more retailers have this diamond
Prices start from $295 NZDSave up to $1,414 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 Oval
$295 NZD