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Round|Lab Grown|IGI

1.91ct K SI1 Round Lab Grown Diamond

EX • K/SI1 • IGI LG451056918

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451056918

Diamond specifications and retailer prices

From $1,651 CAD
As of November 5, 2026
Save $4,499 CAD (73%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $6,149 CAD at MOH London · As of November 1, 2026
View at MOH London

About this 1.91ct lab-grown round diamond

This 1.91ct lab-grown round sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451056918 or 451056918. Listed at 10 retailers as of November 1, 2026, with prices from $1,651 to $6,149, a $4,499 spread on the same certified stone. MOH London lists it at $6,149. 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

1.91
Carat
K
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451056918
Dimensions8.08 × 8.12 × 4.72 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
8.08 mm8.12 mm1.91 ctK / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451056918
Side View
Table 62.0%Crown 33.3°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 58.2%

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 5
Current: $6,149 CAD|Low: $1,584 CAD|High: $6,233 CAD|Avg: $2,964 CAD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 4$1,651 CAD
Retailer 5$1,915 CAD
Retailer 7$1,915 CAD
Retailer 2$2,095 CAD
Retailer 3$2,158 CAD
Retailer 9$2,737 CAD
Retailer 6$3,038 CAD
Retailer 8$3,772 CAD
MOH London$6,149 CAD

37 data points across 9 retailers

10 retailers$1,651 CAD to $6,149 CAD

A
Cheapest Retailer
-
$1,651 CAD
A
Retailer 2
-
$1,795 CAD
View
B+
Retailer 3
-
$1,915 CAD
View
Retailer 4
-
$1,915 CAD
View
Price last confirmed 25 days ago
A
Retailer 5
-
$2,095 CAD
View
B+
Retailer 6
-
$2,158 CAD
View
B
Retailer 7
-
$3,038 CAD
View
B
Retailer 8
-
$3,588 CAD
View
B
Retailer 9
-
$3,772 CAD
View
Most Expensive
B
MOH London
LG451056918 · Nov 1
$6,149 CAD
£3,467 GBP
View
9 more retailers have this diamond
Prices start from $1,651 CADSave up to $4,499 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
1.91ct Round
$1,651 CAD