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Radiant|Lab Grown|IGI

3.15ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG768631131

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

Certificate IGI LG768631131

Diamond specifications and retailer prices

From £1,089 GBP
$1,459 USD
As of October 30, 2026
Save £6,270 GBP (85%) vs most expensive(unlock to see where)
11 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 LG768631131 or 768631131. Listed at 11 retailers as of October 30, 2026, with prices from £1,089 to £7,359, a £6,270 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 angle40°
Pavilion angle32.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG768631131
Dimensions10.44 × 7.15 × 4.75 mm
L/W Ratio1.46
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
10.44 mm7.15 mm3.15 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG768631131
Side View
Table 59.0%Crown 40°Girdle: STK-THKPavilion 32.4°Culet: NoneDepth 66.4%

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: £948 GBP|High: £9,269 GBP|Avg: £3,276 GBP|-6.8%
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
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Retailer 15
Retailer 16
October 31, 2026
Retailer 6£948 GBP
Retailer 7£1,034 GBP
Retailer 11£1,089 GBP
Retailer 9£1,116 GBP
Retailer 16£1,578 GBP
Retailer 2£1,728 GBP
Retailer 13£1,811 GBP
Retailer 10£1,951 GBP
Retailer 4£2,521 GBP
Retailer 15£2,714 GBP
Retailer 14£3,428 GBP
Retailer 8£3,963 GBP
Retailer 5£4,079 GBP
Retailer 3£5,491 GBP
Retailer 12£6,881 GBP
Do Amore Diamonds£7,359 GBP

18 data points across 16 retailers

11 retailers£1,089 GBP to £7,359 GBP

A
Cheapest Retailer
-
£1,089 GBP
$1,459 USD
A
Retailer 2
-
£1,116 GBP
$1,495 USD
View
A
Retailer 3
-
£1,578 GBP
$2,115 USD
View
Retailer 4
-
£1,728 GBP
€2,205 EUR
View
A
Retailer 5
-
£1,811 GBP
$2,427 USD
View
A
Retailer 6
-
£1,951 GBP
$2,614 USD
View
B+
Retailer 7
-
£2,714 GBP
$3,637 USD
View
B+
Retailer 8
-
£3,428 GBP
View
Retailer 9
-
£5,491 GBP
A$11,319 AUD
View
Price last confirmed 12 days ago
B
Retailer 10
-
£6,881 GBP
$9,220 USD
View
Most Expensive
B
Do Amore Diamonds
27-D4C13AA8D · Oct 31
£7,359 GBP
$9,860 USD
View
10 more retailers have this diamond
Prices start from £1,089 GBPSave up to £6,270 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
£1,089 GBP