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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 $980 USD
As of November 2, 2026
Save $3,931 USD (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $4,911 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 LG447099720 or 447099720. Listed at 11 retailers as of November 1, 2026, with prices from $980 to $4,911, a $3,931 spread on the same certified stone. MOH London lists it at $4,911. 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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $4,911 USD|Low: $980 USD|High: $4,970 USD|Avg: $2,156 USD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 5$980 USD
Retailer 6$1,318 USD
Retailer 10$1,433 USD
Retailer 7$1,528 USD
Retailer 11$1,528 USD
Retailer 12$1,700 USD
Retailer 2$2,091 USD
Retailer 4$2,113 USD
Retailer 8$2,417 USD
Retailer 3$2,849 USD
Retailer 9$2,865 USD
MOH London$4,911 USD

38 data points across 12 retailers

11 retailers$980 USD to $4,911 USD

A
Cheapest Retailer
-
$980 USD
A
Retailer 2
-
$1,318 USD
View
B+
Retailer 3
-
$1,433 USD
View
Retailer 4
-
$1,528 USD
View
Price last confirmed 21 days ago
B+
Retailer 5
-
$1,528 USD
View
B+
Retailer 6
-
$1,700 USD
View
B+
Retailer 7
-
$2,091 USD
£1,647 GBP
View
B
Retailer 8
-
$2,417 USD
View
B
Retailer 9
-
$2,849 USD
View
B
Retailer 10
-
$2,865 USD
View
Most Expensive
B
MOH London
LG447099720 · Nov 1
$4,911 USD
£3,867 GBP
View
10 more retailers have this diamond
Prices start from $980 USDSave up to $3,931 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