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Round|Lab Grown|IGI

1.78ct I SI2 Round Lab Grown Diamond

ID • I/SI2 • IGI LG470149591

Shape and cutting style on the report: Round brilliant

Certificate IGI LG470149591

Diamond specifications and retailer prices

From €302 EUR
$337 USD
As of October 29, 2026
Save €1,315 EUR (81%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €1,616 EUR at MOH London · As of October 25, 2026
View at MOH London

About this 1.78ct lab-grown round diamond

This 1.78ct lab-grown round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG470149591 or 470149591. Listed at 15 retailers as of October 25, 2026, with prices from €302 to €1,616, a €1,315 spread on the same certified stone. MOH London lists it at €1,616. 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

1.78
Carat
I
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG470149591
Dimensions7.77 × 7.82 × 4.80 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.77 mm7.82 mm1.78 ctI / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG470149591
Side View
Table 57.0%Crown 35.2°Girdle: MediumPavilion 40.9°Culet: NoneDepth 61.6%

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: Oct 29
Current: €1,616 EUR|Low: €302 EUR|High: €1,622 EUR|Avg: €785 EUR|-0.4%
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
October 30, 2026
Retailer 14€302 EUR
Retailer 11€350 EUR
Retailer 3€374 EUR
Retailer 10€374 EUR
Retailer 8€392 EUR
Retailer 9€484 EUR
Retailer 12€680 EUR
Retailer 6€694 EUR
Retailer 4€729 EUR
Retailer 7€767 EUR
Retailer 2€841 EUR
Retailer 13€1,098 EUR
Retailer 5€1,211 EUR
Retailer 15€1,328 EUR
MOH London€1,616 EUR

14 data points across 15 retailers

15 retailers€302 EUR to €1,616 EUR

A
Cheapest Retailer
-
€302 EUR
$337 USD
A
Retailer 2
-
€350 EUR
$391 USD
View
A
Retailer 3
-
€374 EUR
$418 USD
View
A
Retailer 4
-
€374 EUR
$418 USD
View
B+
Retailer 5
-
€392 EUR
$438 USD
View
A
Retailer 6
-
€484 EUR
£426 GBP
View
A
Retailer 7
-
€680 EUR
$760 USD
View
A
Retailer 8
-
€694 EUR
$775 USD
View
A
Retailer 9
-
€729 EUR
$815 USD
View
A
Retailer 10
-
€767 EUR
$857 USD
View
A
Retailer 11
-
€841 EUR
$940 USD
View
B+
Retailer 12
-
€1,098 EUR
$1,227 USD
View
B+
Retailer 13
-
€1,211 EUR
$1,353 USD
View
B+
Retailer 14
-
€1,328 EUR
$1,484 USD
View
Most Expensive
B+
MOH London
LG470149591 · Oct 25
€1,616 EUR
£1,422 GBP
View
14 more retailers have this diamond
Prices start from €302 EURSave up to €1,315 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
1.78ct Round
€302 EUR