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Round|Lab Grown|IGI

1.91ct K SI1 Round Lab Grown Diamond

ID • K/SI1 • IGI LG485136604

Shape and cutting style on the report: Round brilliant

Certificate IGI LG485136604

Diamond specifications and retailer prices

From £878 GBP
As of November 5, 2026
Save £2,385 GBP (73%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,263 GBP at MOH London · As of November 5, 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 LG485136604 or 485136604. Listed at 10 retailers as of November 5, 2026, with prices from £878 to £3,263, a £2,385 spread on the same certified stone. MOH London lists it at £3,263. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG485136604
Dimensions8.00 × 7.94 × 4.89 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.00 mm7.94 mm1.91 ctK / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG485136604
Side View
Table 55.0%Crown 34.2°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 61.4%

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: £3,263 GBP|Low: £843 GBP|High: £3,316 GBP|Avg: £1,586 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 4£878 GBP
Retailer 5£1,019 GBP
Retailer 7£1,019 GBP
Retailer 2£1,114 GBP
Retailer 3£1,148 GBP
Retailer 9£1,456 GBP
Retailer 10£1,577 GBP
Retailer 6£1,616 GBP
Retailer 8£2,007 GBP
MOH London£3,263 GBP

38 data points across 10 retailers

10 retailers£878 GBP to £3,263 GBP

A
Cheapest Retailer
-
£878 GBP
A
Retailer 2
-
£955 GBP
View
A
Retailer 3
-
£1,019 GBP
View
Retailer 4
-
£1,019 GBP
View
Price last confirmed 25 days ago
A
Retailer 5
-
£1,114 GBP
View
B+
Retailer 6
-
£1,148 GBP
View
B+
Retailer 7
-
£1,616 GBP
View
B
Retailer 8
-
£1,909 GBP
View
B
Retailer 9
-
£2,007 GBP
View
Most Expensive
B
MOH London
LG485136604 · Nov 5
£3,263 GBP
View
9 more retailers have this diamond
Prices start from £878 GBPSave up to £2,385 GBP

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
£878 GBP