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5.15ct F SI2 Round Lab Grown Diamond

EX • F/SI2 • IGI LG512235621

Shape and cutting style on the report: Round brilliant

Certificate IGI LG512235621

Diamond specifications and retailer prices

From £475 GBP
$637 USD
As of November 1, 2026
Save £1,862 GBP (80%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £2,337 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 5.15ct lab-grown round diamond

This 5.15ct lab-grown round sits in the over five carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG512235621 or 512235621. Listed at 13 retailers as of October 29, 2026, with prices from £475 to £2,337, a £1,862 spread on the same certified stone. MOH London lists it at £2,337. 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

5.15
Carat
F
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG512235621
Dimensions11.08 × 11.12 × 6.89 mm
L/W Ratio1.00
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
11.08 mm11.12 mm5.15 ctF / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG512235621
Side View
Table 55.5%Crown 32.5°Girdle: MED-STKPavilion 41.5°Culet: NoneDepth 62.1%

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: £2,337 GBP|Low: £475 GBP|High: £21,932 GBP|Avg: £1,499 GBP|-2.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 1, 2026
Retailer 9£475 GBP
Retailer 2£492 GBP
Retailer 7£518 GBP
Retailer 13£532 GBP
Retailer 11£552 GBP
Retailer 5£817 GBP
Retailer 10£843 GBP
Retailer 6£878 GBP
Retailer 12£1,322 GBP
Retailer 8£1,410 GBP
Retailer 4£1,552 GBP
Retailer 3£2,239 GBP
MOH London£2,337 GBP

13 data points across 13 retailers

13 retailers£475 GBP to £2,337 GBP

A
Cheapest Retailer
-
£475 GBP
$637 USD
A
Retailer 2
-
£492 GBP
View
A
Retailer 3
-
£518 GBP
$694 USD
View
A
Retailer 4
-
£532 GBP
$713 USD
View
Final sale: no returns
A
Retailer 5
-
£552 GBP
$739 USD
View
B+
Retailer 6
-
£817 GBP
$1,095 USD
View
B+
Retailer 7
-
£843 GBP
$1,130 USD
View
B+
Retailer 8
-
£878 GBP
View
B
Retailer 9
-
£1,322 GBP
$1,772 USD
View
B
Retailer 10
-
£1,410 GBP
$1,889 USD
View
B
Retailer 11
-
£1,552 GBP
$2,079 USD
View
B
Retailer 12
-
£2,239 GBP
$3,000 USD
View
Most Expensive
B
MOH London
LG512235621 · Oct 29
£2,337 GBP
View
12 more retailers have this diamond
Prices start from £475 GBPSave up to £1,862 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
5.15ct Round
£475 GBP