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Oval|Lab Grown|IGI

1.78ct J SI1 Oval Lab Grown Diamond

ID • J/SI1 • IGI LG447099720

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG447099720

Diamond specifications and retailer prices

From €877 EUR
$980 USD
As of October 31, 2026
Save €3,541 EUR (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €4,419 EUR at MOH London · As of October 29, 2026
View at MOH London

About this 1.78ct lab-grown oval diamond

This 1.78ct lab-grown oval sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG447099720 or 447099720. Listed at 11 retailers as of October 29, 2026, with prices from €877 to €4,419, a €3,541 spread on the same certified stone. MOH London lists it at €4,419. 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
J
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36.3°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG447099720
Dimensions9.17 × 6.90 × 4.41 mm
L/W Ratio1.33
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
9.17 mm6.90 mm1.78 ctJ / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG447099720
Side View
Table 55.5%Crown 36.3°Girdle: MED-THKPavilion 41.3°Culet: NoneDepth 63.9%

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 31
Current: €4,419 EUR|Low: €877 EUR|High: €4,448 EUR|Avg: €1,931 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
October 30, 2026
Retailer 2€877 EUR
Retailer 6€1,180 EUR
Retailer 10€1,283 EUR
Retailer 7€1,368 EUR
Retailer 11€1,368 EUR
Retailer 12€1,522 EUR
Retailer 5€1,878 EUR
Retailer 4€1,891 EUR
Retailer 8€2,163 EUR
Retailer 3€2,550 EUR
Retailer 9€2,564 EUR
MOH London€4,419 EUR

36 data points across 12 retailers

11 retailers€877 EUR to €4,419 EUR

A
Cheapest Retailer
-
€877 EUR
$980 USD
B+
Retailer 2
-
€1,180 EUR
$1,318 USD
View
B+
Retailer 3
-
€1,283 EUR
$1,433 USD
View
Retailer 4
-
€1,368 EUR
$1,528 USD
View
Price last confirmed 20 days ago
B+
Retailer 5
-
€1,368 EUR
$1,528 USD
View
B+
Retailer 6
-
€1,522 EUR
$1,700 USD
View
B+
Retailer 7
-
€1,878 EUR
£1,652 GBP
View
B
Retailer 8
-
€2,163 EUR
$2,417 USD
View
B
Retailer 9
-
€2,550 EUR
$2,849 USD
View
B
Retailer 10
-
€2,564 EUR
$2,865 USD
View
Most Expensive
B
MOH London
LG447099720 · Oct 29
€4,419 EUR
£3,887 GBP
View
10 more retailers have this diamond
Prices start from €877 EURSave up to €3,541 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 Oval
€877 EUR