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Radiant|Lab Grown|IGI

3.15ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG628447916

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

Certificate IGI LG628447916

Diamond specifications and retailer prices

From £829 GBP
$1,111 USD
As of October 30, 2026
Save £6,530 GBP (89%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £7,359 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

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 LG628447916 or 628447916. Listed at 17 retailers as of October 30, 2026, with prices from £829 to £7,359, a £6,530 spread on the same certified stone. Do Amore Diamonds lists it at £7,359. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.9°
Pavilion angle32.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG628447916
Dimensions10.40 × 10.40 × 7.13 mm
L/W Ratio1.00
Culet sizePointed
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
10.40 mm10.40 mm3.15 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG628447916
Side View
Table 63.0%Crown 46.9°Girdle: Slightly ThickPavilion 32.6°Culet: NoneDepth 66.3%

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 30
Current: £7,359 GBP|Low: £829 GBP|High: £7,896 GBP|Avg: £2,763 GBP|-6.8%
Do Amore Diamonds
Retailer 2
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Retailer 11
Retailer 12
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Retailer 17
October 31, 2026
Retailer 13£829 GBP
Retailer 4£931 GBP
Retailer 9£1,034 GBP
Retailer 12£1,089 GBP
Retailer 10£1,116 GBP
Retailer 3£1,578 GBP
Retailer 2£1,728 GBP
Retailer 14£1,811 GBP
Retailer 11£1,951 GBP
Retailer 17£1,990 GBP
Retailer 5£2,523 GBP
Retailer 16£2,714 GBP
Retailer 15£3,428 GBP
Retailer 6£4,019 GBP
Retailer 7£5,240 GBP
Retailer 8£6,112 GBP
Do Amore Diamonds£7,359 GBP

34 data points across 17 retailers

17 retailers£829 GBP to £7,359 GBP

A
Cheapest Retailer
-
£829 GBP
$1,111 USD
A
Retailer 2
-
£931 GBP
$1,248 USD
View
A
Retailer 3
-
£1,034 GBP
$1,386 USD
View
Final sale: no returns
A
Retailer 4
-
£1,089 GBP
$1,459 USD
View
A
Retailer 5
-
£1,116 GBP
$1,495 USD
View
A
Retailer 6
-
£1,578 GBP
$2,115 USD
View
A
Retailer 7
-
£1,728 GBP
€2,205 EUR
View
A
Retailer 8
-
£1,811 GBP
$2,427 USD
View
A
Retailer 9
-
£1,951 GBP
$2,614 USD
View
A
Retailer 10
-
£1,990 GBP
$2,666 USD
View
Retailer 11
-
£2,523 GBP
A$5,200 AUD
View
Price last confirmed 9 days ago
B+
Retailer 12
-
£2,714 GBP
$3,637 USD
View
B+
Retailer 13
-
£3,428 GBP
View
Retailer 14
-
£4,019 GBP
$5,385 USD
View
Price last confirmed 12 days ago
Retailer 15
-
£5,240 GBP
A$10,802 AUD
View
Price last confirmed 22 days ago
B
Retailer 16
-
£6,112 GBP
$8,190 USD
View
Most Expensive
B
Do Amore Diamonds
27-B5D3A5C08 · Oct 31
£7,359 GBP
$9,860 USD
View
16 more retailers have this diamond
Prices start from £829 GBPSave up to £6,530 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
£829 GBP