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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 €1,053 EUR
As of November 5, 2026
Save €2,870 EUR (73%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: €3,923 EUR 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 €1,053 to €3,923, a €2,870 spread on the same certified stone. MOH London lists it at €3,923. 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
Colour
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

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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 5
Current: €3,923 EUR|Low: €1,010 EUR|High: €3,976 EUR|Avg: €1,891 EUR
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 4€1,053 EUR
Retailer 5€1,221 EUR
Retailer 7€1,221 EUR
Retailer 2€1,336 EUR
Retailer 3€1,377 EUR
Retailer 9€1,746 EUR
Retailer 6€1,938 EUR
Retailer 8€2,406 EUR
MOH London€3,923 EUR

37 data points across 9 retailers

10 retailers€1,053 EUR to €3,923 EUR

A
Cheapest Retailer
-
€1,053 EUR
A
Retailer 2
-
€1,145 EUR
View
B+
Retailer 3
-
€1,221 EUR
View
Retailer 4
-
€1,221 EUR
View
Price last confirmed 25 days ago
A
Retailer 5
-
€1,336 EUR
View
B+
Retailer 6
-
€1,377 EUR
View
B
Retailer 7
-
€1,938 EUR
View
B
Retailer 8
-
€2,289 EUR
View
B
Retailer 9
-
€2,406 EUR
View
Most Expensive
B
MOH London
LG451056918 · Nov 1
€3,923 EUR
£3,467 GBP
View
9 more retailers have this diamond
Prices start from €1,053 EURSave up to €2,870 EUR

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
€1,053 EUR