Radiant|Lab Grown|IGI

15.16ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG582351465

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG582351465

Diamond specifications and retailer prices

From £1,345 GBP
As of November 1, 2026
Save £1,794 GBP (57%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £3,138 GBP at NZ Jewellers · As of November 1, 2026
View at NZ Jewellers

About this 15.16ct lab-grown radiant diamond

This 15.16ct lab-grown radiant sits in the over five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG582351465 or 582351465. Listed at 13 retailers as of November 1, 2026, with prices from £1,345 to £3,138, a £1,794 spread on the same certified stone. NZ Jewellers lists it at £3,138. 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

15.16
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.7°
Pavilion angle34.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG582351465
Dimensions17.73 × 12.12 × 8.01 mm
L/W Ratio1.46
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
17.73 mm12.12 mm15.16 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG582351465
Side View
Table 65.0%Crown 44.7°Girdle: Slightly ThickPavilion 34.3°Culet: NoneDepth 66.1%

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: £3,138 GBP|Low: £1,345 GBP|High: £36,828 GBP|Avg: £7,345 GBP
NZ Jewellers
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
Retailer 16
November 2, 2026
Retailer 10£1,345 GBP
Retailer 5£1,443 GBP
Retailer 4£1,570 GBP
Retailer 13£1,674 GBP
Retailer 14£1,799 GBP
Retailer 16£1,968 GBP
Retailer 15£2,164 GBP
Retailer 2£2,284 GBP
Retailer 9£2,622 GBP
Retailer 11£2,664 GBP
Retailer 12£2,749 GBP
NZ Jewellers£3,138 GBP
Retailer 8£7,917 GBP
Retailer 3£11,395 GBP
Retailer 7£18,240 GBP
Retailer 6£36,828 GBP

7 data points across 16 retailers

13 retailers£1,345 GBP to £3,138 GBP

A
Cheapest Retailer
-
£1,345 GBP
A
Retailer 2
-
£1,443 GBP
$1,934 USD
View
A
Retailer 3
-
£1,570 GBP
$2,104 USD
View
A
Retailer 4
-
£1,674 GBP
$2,243 USD
View
A
Retailer 5
-
£1,799 GBP
$2,410 USD
View
B+
Retailer 6
-
£1,968 GBP
HK$20,600 HKD
View
B+
Retailer 7
-
£2,164 GBP
$2,900 USD
View
B+
Retailer 8
-
£2,284 GBP
View
B+
Retailer 9
-
£2,622 GBP
$3,513 USD
View
B
Retailer 10
-
£2,664 GBP
€3,400 EUR
View
B+
Retailer 11
-
£2,749 GBP
$3,684 USD
View
Most Expensive
B
NZ Jewellers
580b4fb6-7132-46dd-9328-ed605ef34208 · Nov 1
£3,138 GBP
$4,205 USD
View
11 more retailers have this diamond
Prices start from £1,345 GBPSave up to £1,794 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
15.16ct Radiant
£1,345 GBP