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Radiant|Lab Grown|IGI

3.15ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG813609580

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

Certificate IGI LG813609580

Diamond specifications and retailer prices

From £999 GBP
$1,338 USD
As of October 31, 2026
Save £8,077 GBP (89%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £9,075 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 3.15ct lab-grown radiant diamond

This 3.15ct lab-grown radiant sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG813609580 or 813609580. Listed at 19 retailers as of October 29, 2026, with prices from £999 to £9,075, a £8,077 spread on the same certified stone. Brilliant Earth lists it at £9,075. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.15
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.2°
Pavilion angle36.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG813609580
Dimensions10.38 × 7.14 × 4.94 mm
L/W Ratio1.45
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.38 mm7.14 mm3.15 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG813609580
Side View
Table 68.0%Crown 44.2°Girdle: MED-STKPavilion 36.1°Culet: NoneDepth 69.2%

Caratlytics Score

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A+
Exceptional
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 31
Current: £2,320 GBP|Low: £999 GBP|High: £5,176 GBP|Avg: £2,290 GBP|-0.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 15
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Retailer 17
Retailer 18
October 31, 2026
Retailer 15£999 GBP
Retailer 5£1,168 GBP
Retailer 2£1,284 GBP
Retailer 16£1,489 GBP
Retailer 7£1,493 GBP
Retailer 13£1,611 GBP
Retailer 14£1,894 GBP
Retailer 18£1,990 GBP
Retailer 1£2,320 GBP
Retailer 10£2,372 GBP
Retailer 4£2,412 GBP
Retailer 9£2,525 GBP
Retailer 6£2,888 GBP
Retailer 8£3,355 GBP
Retailer 17£3,464 GBP
Retailer 11£3,625 GBP
Retailer 3£3,765 GBP
Retailer 12£5,176 GBP

18 data points across 18 retailers

19 retailers£999 GBP to £9,075 GBP

A+
Cheapest Retailer
-
£999 GBP
$1,338 USD
Final sale: no returns
A
Retailer 2
-
£1,168 GBP
$1,565 USD
View
A
Retailer 3
-
£1,284 GBP
$1,720 USD
View
A
Retailer 4
-
£1,489 GBP
View
A
Retailer 5
-
£1,493 GBP
$2,000 USD
View
A
Retailer 6
-
£1,611 GBP
CA$2,999 CAD
View
A
Retailer 7
-
£1,894 GBP
€2,417 EUR
View
A
Retailer 8
-
£1,990 GBP
$2,667 USD
View
A
Retailer 9
-
£2,320 GBP
$3,109 USD
View
Retailer 10
-
£2,372 GBP
A$4,889 AUD
View
Price last confirmed 9 days ago
A
Retailer 11
-
£2,412 GBP
ZAR 52,215 ZAR
View
A
Retailer 12
-
£2,525 GBP
View
B+
Retailer 13
-
£2,888 GBP
$3,869 USD
View
B+
Retailer 14
-
£3,355 GBP
View
B+
Retailer 15
-
£3,464 GBP
SGD 6,272 SGD
View
B+
Retailer 16
-
£3,625 GBP
$4,858 USD
View
B+
Retailer 17
-
£3,765 GBP
$5,045 USD
View
B+
Retailer 18
-
£5,176 GBP
A$10,670 AUD
View
Most Expensive
B
Brilliant Earth
20507935A · Oct 29
£9,075 GBP
$12,160 USD
View
18 more retailers have this diamond
Prices start from £999 GBPSave up to £8,077 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+
3.15ct Radiant
£999 GBP