Round|Lab Grown|IGI

5.15ct E SI2 Round Lab Grown Diamond

ID • E/SI2 • IGI LG683547837

Shape and cutting style on the report: Round brilliant

Certificate IGI LG683547837

Diamond specifications and retailer prices

From £473 GBP
$634 USD
As of October 29, 2026
Save £2,124 GBP (82%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £2,597 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 5.15ct lab-grown round diamond

This 5.15ct lab-grown round sits in the over five carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG683547837 or 683547837. Listed at 16 retailers as of October 29, 2026, with prices from £473 to £2,597, a £2,124 spread on the same certified stone. Brilliant Earth lists it at £2,597. 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
E
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG683547837
Dimensions11.03 × 11.01 × 6.82 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.03 mm11.01 mm5.15 ctE / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG683547837
Side View
Table 57.0%Crown 34.8°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 61.9%

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: Oct 29
Current: £2,597 GBP|Low: £473 GBP|High: £4,560 GBP|Avg: £1,447 GBP|-43.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 8£473 GBP
Retailer 13£528 GBP
Retailer 10£549 GBP
Retailer 2£787 GBP
Retailer 6£874 GBP
Retailer 5£909 GBP
Retailer 11£916 GBP
Retailer 12£1,270 GBP
Retailer 3£1,307 GBP
Retailer 7£1,384 GBP
Retailer 4£2,239 GBP
Retailer 9£2,326 GBP
Brilliant Earth£2,597 GBP

43 data points across 13 retailers

16 retailers£473 GBP to £2,597 GBP

A
Cheapest Retailer
-
£473 GBP
$634 USD
A
Retailer 2
-
£528 GBP
$707 USD
View
A
Retailer 3
-
£549 GBP
$736 USD
View
Retailer 4
-
£563 GBP
$754 USD
View
Price last confirmed 14 days ago
B+
Retailer 5
-
£787 GBP
$1,055 USD
View
A
Retailer 6
-
£874 GBP
View
B+
Retailer 7
-
£909 GBP
$1,218 USD
View
A
Retailer 8
-
£916 GBP
€1,169 EUR
View
B+
Retailer 9
-
£1,270 GBP
A$2,618 AUD
View
B+
Retailer 10
-
£1,307 GBP
$1,751 USD
View
B+
Retailer 11
-
£1,384 GBP
$1,854 USD
View
Retailer 12
-
£1,402 GBP
$1,879 USD
View
Price last confirmed 31 days ago
B
Retailer 13
-
£1,582 GBP
$2,120 USD
View
Retailer 14
-
£2,239 GBP
$3,000 USD
View
Price last confirmed 9 days ago
B
Retailer 15
-
£2,326 GBP
View
Most Expensive
B
Brilliant Earth
14050581A · Oct 30
£2,597 GBP
$3,480 USD
View
15 more retailers have this diamond
Prices start from £473 GBPSave up to £2,124 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
£473 GBP