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Round|Lab Grown|IGI

15.09ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG579385501

Shape and cutting style on the report: Round brilliant

Certificate IGI LG579385501

Diamond specifications and retailer prices

From £3,773 GBP
$5,056 USD
As of October 29, 2026
Save £13,303 GBP (78%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £25,965 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 15.09ct lab-grown round diamond

This 15.09ct lab-grown round sits in the over five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG579385501 or 579385501. Listed at 12 retailers as of October 29, 2026, with a 353% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

15.09
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG579385501
Dimensions16.02 × 15.92 × 9.69 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
16.02 mm15.92 mm15.09 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG579385501
Side View
Table 58.0%Crown 34.5°Girdle: MediumPavilion 40.8°Culet: NoneDepth 60.6%

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: £25,965 GBP|Low: £3,623 GBP|High: £25,965 GBP|Avg: £8,478 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 1, 2026
Retailer 10£3,773 GBP
Retailer 2£3,881 GBP
Retailer 13£3,955 GBP
Retailer 15£4,226 GBP
Retailer 4£4,535 GBP
Retailer 8£5,489 GBP
Retailer 9£5,489 GBP
Retailer 14£5,736 GBP
Retailer 6£5,827 GBP
Retailer 12£6,765 GBP
Retailer 3£7,659 GBP
Retailer 5£10,394 GBP
Retailer 7£14,526 GBP
Retailer 11£17,076 GBP
Do Amore Diamonds£25,965 GBP

41 data points across 15 retailers

12 retailers£3,773 GBP to £17,076 GBP

A
Cheapest Retailer
-
£3,773 GBP
$5,056 USD
B+
Retailer 2
-
£3,881 GBP
View
B+
Retailer 3
-
£3,955 GBP
$5,299 USD
View
B+
Retailer 4
-
£4,226 GBP
$5,663 USD
View
Final sale: no returns
B+
Retailer 5
-
£5,489 GBP
$7,355 USD
View
B+
Retailer 6
-
£5,489 GBP
$7,355 USD
View
B+
Retailer 7
-
£5,736 GBP
$7,686 USD
View
B+
Retailer 8
-
£5,827 GBP
HK$61,000 HKD
View
B
Retailer 9
-
£6,765 GBP
$9,064 USD
View
B
Retailer 10
-
£10,394 GBP
$13,927 USD
View
B
Retailer 11
-
£17,076 GBP
$22,880 USD
View
Most Expensive
Do Amore Diamonds
27-04D79734D · Oct 31
£25,965 GBP
$34,790 USD
View
Price under review
11 more retailers have this diamond
Prices start from £3,773 GBPSave up to £13,303 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
15.09ct Round
£3,773 GBP