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Round|Lab Grown|IGI

0.51ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG681525451

Shape and cutting style on the report: Round brilliant

Certificate IGI LG681525451

Diamond specifications and retailer prices

From £96 GBP
$128 USD
As of October 29, 2026
Save £891 GBP (90%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £987 GBP at MOH London · As of October 27, 2026
View at MOH London

About this 0.51ct lab-grown round diamond

This 0.51ct lab-grown round sits in the half to three-quarter carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG681525451 or 681525451. Listed at 20 retailers as of October 27, 2026, with prices from £96 to £987, a £891 spread on the same certified stone. MOH London lists it at £987. Flawless clarity in sub-one-carat stones is rarely visible to the naked eye over VS1, so you are paying a meaningful premium for grade rather than appearance.

The 4Cs

0.51
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG681525451
Dimensions5.16 × 5.20 × 3.14 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
5.16 mm5.20 mm0.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG681525451
Side View
Table 59.0%Crown 33.7°Girdle: MediumPavilion 41.1°Culet: NoneDepth 60.6%

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: Oct 29
Current: £987 GBP|Low: £91 GBP|High: £991 GBP|Avg: £279 GBP|+0.9%
MOH London
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October 30, 2026
Retailer 9£96 GBP
Retailer 7£107 GBP
Retailer 16£110 GBP
Retailer 5£118 GBP
Retailer 19£118 GBP
Retailer 17£183 GBP
Retailer 2£197 GBP
Retailer 13£213 GBP
Retailer 12£218 GBP
Retailer 4£225 GBP
Retailer 11£284 GBP
Retailer 18£287 GBP
Retailer 14£301 GBP
Retailer 15£304 GBP
Retailer 6£305 GBP
Retailer 10£380 GBP
Retailer 8£422 GBP
Retailer 3£718 GBP
MOH London£987 GBP

39 data points across 19 retailers

20 retailers£96 GBP to £987 GBP

A
Cheapest Retailer
-
£96 GBP
$128 USD
A
Retailer 2
-
£107 GBP
$143 USD
View
Final sale: no returns
A
Retailer 3
-
£110 GBP
$148 USD
View
A
Retailer 4
-
£118 GBP
$158 USD
View
A
Retailer 5
-
£118 GBP
$158 USD
View
A
Retailer 6
-
£183 GBP
$245 USD
View
A
Retailer 7
-
£197 GBP
View
A
Retailer 8
-
£213 GBP
ZAR 4,618 ZAR
View
A
Retailer 9
-
£218 GBP
€278 EUR
View
A
Retailer 10
-
£225 GBP
$302 USD
View
B+
Retailer 11
-
£284 GBP
$380 USD
View
B+
Retailer 12
-
£287 GBP
$385 USD
View
B+
Retailer 13
-
£301 GBP
A$620 AUD
View
B+
Retailer 14
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£304 GBP
A$627 AUD
View
B+
Retailer 15
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£305 GBP
$408 USD
View
B+
Retailer 16
-
£380 GBP
$509 USD
View
B+
Retailer 17
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£381 GBP
$511 USD
View
B
Retailer 18
-
£422 GBP
$565 USD
View
B
Retailer 19
-
£718 GBP
$963 USD
View
Most Expensive
B
MOH London
LG681525451 · Oct 26
£987 GBP
View
19 more retailers have this diamond
Prices start from £96 GBPSave up to £891 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
0.51ct Round
£96 GBP