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Round|Lab Grown|IGI

0.51ct F I1 Round Lab Grown Diamond

EX • F/I1 • IGI LG816670138

Shape and cutting style on the report: Round brilliant

Certificate IGI LG816670138

Diamond specifications and retailer prices

From £60 GBP
$80 USD
As of November 1, 2026
Save £486 GBP (89%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £546 GBP at MOH London · As of November 1, 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 F colour (colourless) and I1 clarity (included), with a top-tier cut grade and certified by IGI LG816670138 or 816670138. Listed at 9 retailers as of November 1, 2026, with prices from £60 to £546, a £486 spread on the same certified stone. MOH London lists it at £546. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

0.51
Carat
F
Colour
I1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle35.2°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816670138
Dimensions5.07 × 5.13 × 3.09 mm
L/W Ratio1.01
Girdle conditionFaceted
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
5.07 mm5.13 mm0.51 ctF / I1
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG816670138
Side View
Table 61.0%Crown 35.2°Girdle: Slightly ThickPavilion 40.2°Culet: NoneDepth 60.4%

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 1
Current: £546 GBP|Low: £60 GBP|High: £549 GBP|Avg: £186 GBP|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 9£60 GBP
Retailer 5£69 GBP
Retailer 3£79 GBP
Retailer 7£79 GBP
Retailer 8£162 GBP
Retailer 4£239 GBP
Retailer 2£266 GBP
Retailer 6£305 GBP
MOH London£546 GBP

7 data points across 9 retailers

9 retailers£60 GBP to £546 GBP

A
Cheapest Retailer
-
£60 GBP
$80 USD
B+
Retailer 2
-
£69 GBP
$93 USD
View
B+
Retailer 3
-
£79 GBP
$106 USD
View
Retailer 4
-
£79 GBP
$106 USD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
£162 GBP
$217 USD
View
B+
Retailer 6
-
£239 GBP
$321 USD
View
B+
Retailer 7
-
£266 GBP
$357 USD
View
B+
Retailer 8
-
£305 GBP
$409 USD
View
Most Expensive
B
MOH London
LG816670138 · Nov 1
£546 GBP
View
8 more retailers have this diamond
Prices start from £60 GBPSave up to £486 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
£60 GBP