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Round|Lab Grown|IGI

1.31ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG771657198

Shape and cutting style on the report: Round brilliant

Certificate IGI LG771657198

Diamond specifications and retailer prices

From $254 CAD
As of October 30, 2026
Save $584 CAD (70%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,475 CAD at Reve Diamonds · As of October 25, 2026
View at Reve Diamonds

About this 1.31ct lab-grown round diamond

This 1.31ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG771657198 or 771657198. Listed at 17 retailers as of October 30, 2026, with a 230% 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

1.31
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG771657198
Dimensions7.05 × 7.02 × 4.33 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.05 mm7.02 mm1.31 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG771657198
Side View
Table 58.0%Crown 33.3°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 61.6%

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 30
Current: $465 CAD|Low: $214 CAD|High: $1,623 CAD|Avg: $674 CAD|-18.2%
Retailer 1
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
Reve Diamonds
November 6, 2026
Retailer 6$219 CAD
Retailer 7$244 CAD
Retailer 15$254 CAD
Retailer 5$272 CAD
Retailer 9$366 CAD
Retailer 1$465 CAD
Retailer 16$473 CAD
Retailer 17$478 CAD
Retailer 14$601 CAD
Retailer 12$691 CAD
Retailer 13$723 CAD
Retailer 11$726 CAD
Retailer 4$732 CAD
Retailer 10$838 CAD
Retailer 3$874 CAD
Retailer 8$950 CAD
Retailer 2$1,271 CAD
Reve Diamonds$1,475 CAD

39 data points across 18 retailers

17 retailers$254 CAD to $838 CAD

Retailer 1
-
$219 CAD
Price last confirmed 11 days ago
A
Retailer 2
-
$254 CAD
View
Retailer 3
-
$272 CAD
View
Price last confirmed 10 days ago
B+
Retailer 4
-
$366 CAD
View
A
Retailer 5
-
$465 CAD
View
Retailer 6
-
$473 CAD
View
Price last confirmed 9 days ago
A
Retailer 7
-
$601 CAD
View
Retailer 8
-
$677 CAD
View
Price last confirmed 16 days ago
A
Retailer 9
-
$691 CAD
View
B+
Retailer 10
-
$723 CAD
View
B+
Retailer 11
-
$726 CAD
View
Retailer 12
-
$732 CAD
View
Price last confirmed 11 days ago
B+
Retailer 13
-
$838 CAD
View
Retailer 14
-
$874 CAD
View
Price last confirmed 13 days ago
Retailer 15
-
$950 CAD
View
Price last confirmed 10 days ago
Retailer 16
-
$1,271 CAD
View
Price last confirmed 11 days ago
Most Expensive
Reve Diamonds
1E17ECC5F · Oct 25
$1,475 CAD
$1,056 USD
View
Price last confirmed 12 days ago
16 more retailers have this diamond
Prices start from $254 CADSave up to $584 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
1.31ct Round
$254 CAD