CaratHunter
Plans
Round|Lab Grown|IGI

1.51ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG770643638

Shape and cutting style on the report: Round brilliant

Certificate IGI LG770643638

Diamond specifications and retailer prices

From $348 CAD
As of November 4, 2026
Save $1,425 CAD (80%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $1,983 CAD at Brilliant Earth · As of October 16, 2026
View at Brilliant Earth

About this 1.51ct lab-grown round diamond

This 1.51ct lab-grown round 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 LG770643638 or 770643638. Listed at 22 retailers as of November 4, 2026, with a 410% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.51
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG770643638
Dimensions7.36 × 7.31 × 4.56 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.36 mm7.31 mm1.51 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG770643638
Side View
Table 56.0%Crown 35.1°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.3%

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: Nov 4
Current: $1,983 CAD|Low: $297 CAD|High: $1,983 CAD|Avg: $872 CAD
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
Retailer 17
Retailer 18
November 6, 2026
Retailer 9$313 CAD
Retailer 16$348 CAD
Retailer 5$387 CAD
Retailer 17$387 CAD
Retailer 3$608 CAD
Retailer 6$661 CAD
Retailer 2$670 CAD
Retailer 11$707 CAD
Retailer 12$712 CAD
Retailer 4$742 CAD
Retailer 18$806 CAD
Retailer 14$1,020 CAD
Retailer 10$1,246 CAD
Retailer 15$1,250 CAD
Retailer 8$1,318 CAD
Retailer 13$1,547 CAD
Retailer 7$1,772 CAD
Brilliant Earth$1,983 CAD

41 data points across 18 retailers

22 retailers$348 CAD to $1,772 CAD

Retailer 1
-
$313 CAD
Price last confirmed 19 days ago
A
Retailer 2
-
$348 CAD
View
Final sale: no returns
Retailer 3
-
$359 CAD
View
Price last confirmed 24 days ago
A
Retailer 4
-
$363 CAD
View
Retailer 5
-
$387 CAD
View
Price last confirmed 12 days ago
Retailer 6
-
$387 CAD
View
Price last confirmed 21 days ago
A
Retailer 7
-
$608 CAD
View
A
Retailer 8
-
$661 CAD
View
A
Retailer 9
-
$670 CAD
View
A
Retailer 10
-
$707 CAD
View
A
Retailer 11
-
$712 CAD
View
B+
Retailer 12
-
$742 CAD
View
B+
Retailer 13
-
$806 CAD
View
B+
Retailer 14
-
$1,020 CAD
View
B
Retailer 15
-
$1,077 CAD
View
Retailer 16
-
$1,235 CAD
View
Price last confirmed 46 days ago
Retailer 17
-
$1,246 CAD
View
Price last confirmed 19 days ago
B
Retailer 18
-
$1,250 CAD
View
B
Retailer 19
-
$1,318 CAD
View
B
Retailer 20
-
$1,547 CAD
View
B
Retailer 21
-
$1,772 CAD
View
Most Expensive
Brilliant Earth
19882042A · Oct 16
$1,983 CAD
$1,420 USD
View
Price last confirmed 20 days ago
21 more retailers have this diamond
Prices start from $348 CADSave up to $1,425 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
1.51ct Round
$348 CAD