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Radiant|Lab Grown|IGI

1.78ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG780619896

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG780619896

Diamond specifications and retailer prices

From $279 CAD
$200 USD
As of November 1, 2026
Save $2,123 CAD (88%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,403 CAD at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 1.78ct lab-grown radiant diamond

This 1.78ct lab-grown radiant 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 LG780619896 or 780619896. Listed at 15 retailers as of October 31, 2026, with prices from $279 to $2,403, a $2,123 spread on the same certified stone. Do Amore Diamonds lists it at $2,403. 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 angle37.6°
Pavilion angle37°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780619896
Dimensions8.34 × 6.27 × 4.19 mm
L/W Ratio1.33
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
8.34 mm6.27 mm1.78 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780619896
Side View
Table 66.0%Crown 37.6°Girdle: MED-STKPavilion 37°Culet: NoneDepth 66.9%

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: Nov 1
Current: $2,403 CAD|Low: $260 CAD|High: $2,500 CAD|Avg: $1,095 CAD|+4.2%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 8$279 CAD
Retailer 11$368 CAD
Retailer 6$423 CAD
Retailer 4$566 CAD
Retailer 10$687 CAD
Retailer 7$877 CAD
Retailer 9$1,108 CAD
Retailer 3$1,537 CAD
Retailer 2$1,598 CAD
Retailer 5$1,634 CAD
Do Amore Diamonds$2,403 CAD

26 data points across 11 retailers

15 retailers$279 CAD to $2,403 CAD

Retailer 1
-
$250 CAD
$179 USD
Price last confirmed 30 days ago
A
Retailer 2
-
$279 CAD
$200 USD
View
Final sale: no returns
Retailer 3
-
$293 CAD
$210 USD
View
Price last confirmed 35 days ago
A
Retailer 4
-
$368 CAD
$263 USD
View
B+
Retailer 5
-
$423 CAD
$303 USD
View
A
Retailer 6
-
$566 CAD
€386 EUR
View
A
Retailer 7
-
$687 CAD
$492 USD
View
B+
Retailer 8
-
$877 CAD
$628 USD
View
B+
Retailer 9
-
$1,108 CAD
$793 USD
View
Retailer 10
-
$1,144 CAD
$819 USD
View
Price last confirmed 32 days ago
B+
Retailer 11
-
$1,390 CAD
$995 USD
View
B+
Retailer 12
-
$1,537 CAD
$1,100 USD
View
B+
Retailer 13
-
$1,598 CAD
£901 GBP
View
B
Retailer 14
-
$1,634 CAD
$1,170 USD
View
Most Expensive
B
Do Amore Diamonds
27-93711A3C9 · Oct 31
$2,403 CAD
$1,720 USD
View
14 more retailers have this diamond
Prices start from $279 CADSave up to $2,123 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 Radiant
$279 CAD