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Round|Lab Grown|IGI

1.91ct F VS1 Round Lab Grown Diamond

ID • F/VS1 • IGI LG738504078

Shape and cutting style on the report: Round brilliant

Certificate IGI LG738504078

Diamond specifications and retailer prices

From £195 GBP
$261 USD
As of November 1, 2026
Save £842 GBP (81%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: £1,493 GBP at Brilliant Earth · As of October 13, 2026
View at Brilliant Earth

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 F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG738504078 or 738504078. Listed at 26 retailers as of November 1, 2026, with a 432% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.91
Carat
F
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG738504078
Dimensions7.94 × 7.88 × 4.95 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
7.94 mm7.88 mm1.91 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG738504078
Side View
Table 58.0%Crown 35.7°Girdle: MediumPavilion 41.2°Culet: NoneDepth 62.5%

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 1
Current: £1,493 GBP|Low: £193 GBP|High: £1,493 GBP|Avg: £554 GBP
Brilliant Earth
Retailer 2
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Retailer 22
November 1, 2026
Retailer 14£195 GBP
Retailer 4£226 GBP
Retailer 18£226 GBP
Retailer 7£242 GBP
Retailer 8£242 GBP
Retailer 20£373 GBP
Retailer 13£383 GBP
Retailer 9£402 GBP
Retailer 19£414 GBP
Retailer 22£415 GBP
Retailer 6£449 GBP
Retailer 16£461 GBP
Retailer 21£470 GBP
Retailer 5£513 GBP
Retailer 3£562 GBP
Retailer 11£642 GBP
Retailer 15£777 GBP
Retailer 12£815 GBP
Retailer 17£951 GBP
Retailer 2£969 GBP
Retailer 10£1,037 GBP
Brilliant Earth£1,493 GBP

29 data points across 22 retailers

26 retailers£195 GBP to £1,037 GBP

A
Cheapest Retailer
-
£195 GBP
$261 USD
A
Retailer 2
-
£226 GBP
$303 USD
View
Final sale: no returns
A
Retailer 3
-
£226 GBP
$303 USD
View
A
Retailer 4
-
£242 GBP
$324 USD
View
Retailer 5
-
£242 GBP
$324 USD
View
Price last confirmed 7 days ago
A
Retailer 6
-
£373 GBP
$500 USD
View
A
Retailer 7
-
£383 GBP
View
B+
Retailer 8
-
£402 GBP
$539 USD
View
A
Retailer 9
-
£414 GBP
€528 EUR
View
A
Retailer 10
-
£415 GBP
ZAR 8,990 ZAR
View
A
Retailer 11
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£449 GBP
$602 USD
View
A
Retailer 12
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£461 GBP
View
A
Retailer 13
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£470 GBP
A$968 AUD
View
A
Retailer 14
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£513 GBP
$687 USD
View
A
Retailer 15
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£562 GBP
A$1,159 AUD
View
B+
Retailer 16
-
£642 GBP
$860 USD
View
B+
Retailer 17
-
£777 GBP
$1,041 USD
View
B+
Retailer 18
-
£787 GBP
$1,054 USD
View
B+
Retailer 19
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£815 GBP
$1,092 USD
View
B
Retailer 20
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£898 GBP
$1,203 USD
View
Retailer 21
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£902 GBP
A$1,859 AUD
View
Price last confirmed 31 days ago
Retailer 22
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£904 GBP
$1,211 USD
View
Price last confirmed 74 days ago
B
Retailer 23
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£951 GBP
$1,274 USD
View
B
Retailer 24
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£969 GBP
View
B
Retailer 25
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£1,037 GBP
$1,389 USD
View
Most Expensive
Brilliant Earth
16462177A · Oct 13
£1,493 GBP
$2,000 USD
View
Price last confirmed 19 days ago
25 more retailers have this diamond
Prices start from £195 GBPSave up to £842 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
£195 GBP