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Round|Lab Grown|IGI

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 €152 EUR
$171 USD
As of October 29, 2026
Save €736 EUR (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €889 EUR at MOH London · As of October 29, 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 October 29, 2026, with prices from €152 to €889, a €736 spread on the same certified stone. MOH London lists it at €889. 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
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

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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: Oct 29
Current: €889 EUR|Low: €152 EUR|High: €895 EUR|Avg: €438 EUR|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 6€152 EUR
Retailer 8€189 EUR
Retailer 3€321 EUR
Retailer 2€337 EUR
Retailer 9€338 EUR
Retailer 10€414 EUR
Retailer 4€441 EUR
Retailer 5€474 EUR
Retailer 7€829 EUR
MOH London€889 EUR

40 data points across 10 retailers

15 retailers€152 EUR to €889 EUR

A
Cheapest Retailer
-
€152 EUR
$171 USD
A
Retailer 2
-
€177 EUR
$198 USD
View
A
Retailer 3
-
€189 EUR
$212 USD
View
A
Retailer 4
-
€189 EUR
$212 USD
View
A
Retailer 5
-
€321 EUR
View
A
Retailer 6
-
€337 EUR
£297 GBP
View
B+
Retailer 7
-
€338 EUR
$379 USD
View
A
Retailer 8
-
€365 EUR
$409 USD
View
B+
Retailer 9
-
€414 EUR
$464 USD
View
Retailer 10
-
€441 EUR
$495 USD
View
Price last confirmed 16 days ago
B+
Retailer 11
-
€474 EUR
$532 USD
View
B
Retailer 12
-
€608 EUR
$682 USD
View
B+
Retailer 13
-
€656 EUR
$736 USD
View
B
Retailer 14
-
€829 EUR
$930 USD
View
Most Expensive
B
MOH London
LG788620074 · Oct 29
€889 EUR
£785 GBP
View
14 more retailers have this diamond
Prices start from €152 EURSave up to €736 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 Round
€152 EUR