CaratHunter
Plans
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 €149 EUR
$166 USD
As of November 1, 2026
Save €712 EUR (83%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: €861 EUR 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 €149 to €861, a €712 spread on the same certified stone. MOH London lists it at €861. 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
Color
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: €861 EUR|Low: €149 EUR|High: €1,190 EUR|Avg: €475 EUR|-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 1, 2026
Retailer 11€149 EUR
Retailer 4€172 EUR
Retailer 12€184 EUR
Retailer 15€206 EUR
Retailer 2€239 EUR
Retailer 9€326 EUR
Retailer 16€332 EUR
Retailer 5€350 EUR
Retailer 14€402 EUR
Retailer 13€410 EUR
Retailer 3€592 EUR
Retailer 10€625 EUR
Retailer 7€627 EUR
Retailer 6€828 EUR
MOH London€861 EUR
Retailer 8€1,190 EUR

6 data points across 16 retailers

12 retailers€149 EUR to €861 EUR

A
Cheapest Retailer
-
€149 EUR
$166 USD
A
Retailer 2
-
€172 EUR
$192 USD
View
A
Retailer 3
-
€184 EUR
$206 USD
View
A
Retailer 4
-
€206 EUR
HK$1,800 HKD
View
A
Retailer 5
-
€239 EUR
£210 GBP
View
A
Retailer 6
-
€326 EUR
£287 GBP
View
B+
Retailer 7
-
€332 EUR
$371 USD
View
B+
Retailer 8
-
€402 EUR
$449 USD
View
B+
Retailer 9
-
€410 EUR
$458 USD
View
B
Retailer 10
-
€592 EUR
$661 USD
View
B
Retailer 11
-
€625 EUR
$698 USD
View
Most Expensive
B
MOH London
LG729580171 · Nov 1
€861 EUR
£757 GBP
View
11 more retailers have this diamond
Prices start from €149 EURSave up to €712 EUR

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
€149 EUR