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Oval|Lab Grown|IGI

1.78ct F SI1 Oval Lab Grown Diamond

ID • F/SI1 • IGI LG779671606

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG779671606

Diamond specifications and retailer prices

From $328 CAD
$235 USD
As of October 29, 2026
Save $1,474 CAD (82%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,802 CAD at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG779671606 or 779671606. Listed at 16 retailers as of October 28, 2026, with prices from $328 to $1,802, a $1,474 spread on the same certified stone. Brilliant Earth lists it at $1,802. 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
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.1°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG779671606
Dimensions9.51 × 6.71 × 4.36 mm
L/W Ratio1.42
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.51 mm6.71 mm1.78 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG779671606
Side View
Table 62.0%Crown 37.1°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 65.0%

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: $1,802 CAD|Low: $316 CAD|High: $1,858 CAD|Avg: $923 CAD|-3.0%
Brilliant Earth
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
Retailer 16
October 30, 2026
Retailer 13$328 CAD
Retailer 3$367 CAD
Retailer 4$381 CAD
Retailer 6$406 CAD
Retailer 14$406 CAD
Retailer 12$527 CAD
Retailer 15$689 CAD
Retailer 2$769 CAD
Retailer 7$869 CAD
Retailer 5$879 CAD
Retailer 16$1,307 CAD
Retailer 11$1,313 CAD
Retailer 8$1,381 CAD
Retailer 10$1,502 CAD
Retailer 9$1,634 CAD
Brilliant Earth$1,802 CAD

43 data points across 16 retailers

16 retailers$328 CAD to $1,802 CAD

A
Cheapest Retailer
-
$328 CAD
$235 USD
A
Retailer 2
-
$367 CAD
$263 USD
View
Final sale: no returns
A
Retailer 3
-
$381 CAD
$273 USD
View
A
Retailer 4
-
$406 CAD
$291 USD
View
A
Retailer 5
-
$406 CAD
$291 USD
View
Retailer 6
-
$527 CAD
£297 GBP
View
Price last confirmed 15 days ago
B+
Retailer 7
-
$689 CAD
$493 USD
View
A
Retailer 8
-
$769 CAD
£433 GBP
View
A
Retailer 9
-
$869 CAD
$622 USD
View
A
Retailer 10
-
$879 CAD
$629 USD
View
B+
Retailer 11
-
$1,307 CAD
$936 USD
View
B+
Retailer 12
-
$1,313 CAD
$940 USD
View
B+
Retailer 13
-
$1,381 CAD
$989 USD
View
B+
Retailer 14
-
$1,502 CAD
$1,075 USD
View
B+
Retailer 15
-
$1,634 CAD
£921 GBP
View
Most Expensive
B
Brilliant Earth
17997459A · Oct 28
$1,802 CAD
$1,290 USD
View
15 more retailers have this diamond
Prices start from $328 CADSave up to $1,474 CAD

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
$328 CAD