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Round|Lab Grown|IGI

1.91ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG640491565

Shape and cutting style on the report: Round brilliant

Certificate IGI LG640491565

Diamond specifications and retailer prices

From £460 GBP
$613 USD
As of October 29, 2026
Save £3,505 GBP (88%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £3,965 GBP at Brilliant Earth · As of October 29, 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 E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG640491565 or 640491565. Listed at 24 retailers as of October 29, 2026, with prices from £460 to £3,965, a £3,505 spread on the same certified stone. Brilliant Earth lists it at £3,965. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.91
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG640491565
Dimensions7.88 × 7.93 × 4.92 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.88 mm7.93 mm1.91 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG640491565
Side View
Table 58.0%Crown 35.8°Girdle: MediumPavilion 41°Culet: NoneDepth 62.2%

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: Oct 29
Current: £3,965 GBP|Low: £442 GBP|High: £3,965 GBP|Avg: £1,317 GBP
Brilliant Earth
Retailer 2
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Retailer 18
October 29, 2026
Retailer 5£460 GBP
Retailer 9£515 GBP
Retailer 8£571 GBP
Retailer 18£668 GBP
Retailer 6£766 GBP
Retailer 15£804 GBP
Retailer 11£863 GBP
Retailer 12£870 GBP
Retailer 2£889 GBP
Retailer 13£981 GBP
Retailer 16£1,338 GBP
Retailer 3£1,417 GBP
Retailer 7£1,530 GBP
Retailer 4£1,735 GBP
Retailer 10£1,887 GBP
Retailer 17£2,031 GBP
Retailer 14£2,482 GBP
Brilliant Earth£3,965 GBP

30 data points across 18 retailers

24 retailers£460 GBP to £3,965 GBP

A
Cheapest Retailer
-
£460 GBP
$613 USD
A
Retailer 2
-
£515 GBP
$686 USD
View
Final sale: no returns
A
Retailer 3
-
£516 GBP
$687 USD
View
A
Retailer 4
-
£571 GBP
$760 USD
View
Retailer 5
-
£571 GBP
$760 USD
View
Price last confirmed 13 days ago
A
Retailer 6
-
£668 GBP
$890 USD
View
A
Retailer 7
-
£740 GBP
$985 USD
View
A
Retailer 8
-
£766 GBP
$1,020 USD
View
A
Retailer 9
-
£804 GBP
A$1,648 AUD
View
A
Retailer 10
-
£863 GBP
View
A
Retailer 11
-
£870 GBP
€1,103 EUR
View
A
Retailer 12
-
£889 GBP
View
A
Retailer 13
-
£981 GBP
ZAR 21,114 ZAR
View
B+
Retailer 14
-
£1,076 GBP
$1,433 USD
View
Retailer 15
-
£1,338 GBP
A$2,741 AUD
View
Price last confirmed 9 days ago
B+
Retailer 16
-
£1,417 GBP
$1,887 USD
View
B+
Retailer 17
-
£1,502 GBP
$2,000 USD
View
Retailer 18
-
£1,530 GBP
A$3,135 AUD
View
Price last confirmed 21 days ago
B+
Retailer 19
-
£1,735 GBP
$2,310 USD
View
B
Retailer 20
-
£1,845 GBP
$2,458 USD
View
B
Retailer 21
-
£1,887 GBP
$2,512 USD
View
B+
Retailer 22
-
£2,031 GBP
$2,705 USD
View
B
Retailer 23
-
£2,482 GBP
View
Most Expensive
B
Brilliant Earth
11460987A · Oct 29
£3,965 GBP
$5,280 USD
View
23 more retailers have this diamond
Prices start from £460 GBPSave up to £3,505 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
£460 GBP