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Oval|Lab Grown|IGI

1.78ct J SI1 Oval Lab Grown Diamond

ID • J/SI1 • IGI LG440013519

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG440013519

Diamond specifications and retailer prices

From $980 USD
As of October 31, 2026
Save $4,666 USD (83%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $5,646 USD at MOH London · As of November 1, 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 LG440013519 or 440013519. Listed at 11 retailers as of October 31, 2026, with prices from $980 to $5,646, a $4,666 spread on the same certified stone. MOH London lists it at $5,646. 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 angle36.2°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG440013519
Dimensions9.56 × 6.73 × 4.30 mm
L/W Ratio1.42
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
9.56 mm6.73 mm1.78 ctJ / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG440013519
Side View
Table 55.0%Crown 36.2°Girdle: MED-STKPavilion 40.5°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: $5,646 USD|Low: $980 USD|High: $5,723 USD|Avg: $2,612 USD|-1.1%
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
November 1, 2026
Retailer 6$980 USD
Retailer 8$1,704 USD
Retailer 12$1,854 USD
Retailer 9$1,977 USD
Retailer 13$1,977 USD
Retailer 5$2,023 USD
Retailer 3$2,145 USD
Retailer 4$2,647 USD
Retailer 2$2,705 USD
Retailer 10$3,106 USD
Retailer 7$3,409 USD
Retailer 11$3,706 USD
MOH London$5,646 USD

37 data points across 13 retailers

11 retailers$980 USD to $5,646 USD

A
Cheapest Retailer
-
$980 USD
B+
Retailer 2
-
$1,704 USD
View
B+
Retailer 3
-
$1,854 USD
View
Retailer 4
-
$1,977 USD
View
Price last confirmed 20 days ago
B+
Retailer 5
-
$1,977 USD
View
B+
Retailer 6
-
$2,145 USD
View
B
Retailer 7
-
$2,705 USD
£2,130 GBP
View
B
Retailer 8
-
$3,106 USD
View
B
Retailer 9
-
$3,409 USD
View
B
Retailer 10
-
$3,706 USD
View
Most Expensive
B
MOH London
LG440013519 · Nov 1
$5,646 USD
£4,446 GBP
View
10 more retailers have this diamond
Prices start from $980 USDSave up to $4,666 USD

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
$980 USD