CaratHunter
Plans
Radiant|Lab Grown|IGI

3.12ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG731557448

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

Certificate IGI LG731557448

Diamond specifications and retailer prices

From £730 GBP
$978 USD
As of October 30, 2026
Save £5,748 GBP (89%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £6,478 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 3.12ct lab-grown radiant diamond

This 3.12ct 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 LG731557448 or 731557448. Listed at 17 retailers as of October 30, 2026, with prices from £730 to £6,478, a £5,748 spread on the same certified stone. Do Amore Diamonds lists it at £6,478. 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

3.12
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.3°
Pavilion angle34.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG731557448
Dimensions10.23 × 7.31 × 4.87 mm
L/W Ratio1.40
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
10.23 mm7.31 mm3.12 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG731557448
Side View
Table 64.0%Crown 44.3°Girdle: Slightly ThickPavilion 34.3°Culet: NoneDepth 66.6%

Caratlytics Score

How it works →
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 30
Current: £6,478 GBP|Low: £730 GBP|High: £7,822 GBP|Avg: £2,597 GBP|-17.2%
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
Retailer 16
Retailer 17
October 31, 2026
Retailer 11£730 GBP
Retailer 17£810 GBP
Retailer 6£974 GBP
Retailer 10£981 GBP
Retailer 9£1,025 GBP
Retailer 16£1,379 GBP
Retailer 3£1,552 GBP
Retailer 15£1,751 GBP
Retailer 12£1,758 GBP
Retailer 2£1,824 GBP
Retailer 4£2,196 GBP
Retailer 14£2,418 GBP
Retailer 13£3,185 GBP
Retailer 5£4,034 GBP
Retailer 7£5,192 GBP
Retailer 8£6,321 GBP
Do Amore Diamonds£6,478 GBP

35 data points across 17 retailers

17 retailers£730 GBP to £6,478 GBP

A+
Cheapest Retailer
-
£730 GBP
$978 USD
A
Retailer 2
-
£810 GBP
$1,085 USD
View
A
Retailer 3
-
£974 GBP
$1,305 USD
View
A
Retailer 4
-
£981 GBP
$1,314 USD
View
A
Retailer 5
-
£1,025 GBP
$1,374 USD
View
Final sale: no returns
A
Retailer 6
-
£1,379 GBP
$1,848 USD
View
Retailer 7
-
£1,552 GBP
€1,981 EUR
View
Price last confirmed 8 days ago
A
Retailer 8
-
£1,751 GBP
$2,346 USD
View
A
Retailer 9
-
£1,758 GBP
$2,356 USD
View
A
Retailer 10
-
£1,824 GBP
$2,444 USD
View
Retailer 11
-
£2,196 GBP
A$4,526 AUD
View
Price last confirmed 10 days ago
A
Retailer 12
-
£2,418 GBP
$3,240 USD
View
B+
Retailer 13
-
£3,185 GBP
View
Retailer 14
-
£4,034 GBP
$5,405 USD
View
Price last confirmed 10 days ago
Retailer 15
-
£5,192 GBP
A$10,703 AUD
View
Price last confirmed 23 days ago
B
Retailer 16
-
£6,321 GBP
$8,470 USD
View
Most Expensive
B
Do Amore Diamonds
27-B48F5ABFF · Oct 31
£6,478 GBP
$8,680 USD
View
16 more retailers have this diamond
Prices start from £730 GBPSave up to £5,748 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+
3.12ct Radiant
£730 GBP