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Radiant|Lab Grown|IGI

3.12ct E IF Radiant Lab Grown Diamond

ID • E/IF • IGI LG828684106

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

Certificate IGI LG828684106

Diamond specifications and retailer prices

From £737 GBP
$981 USD
As of October 29, 2026
Save £2,246 GBP (75%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £3,613 GBP at Novita Diamonds · As of October 5, 2026
View at Novita Diamonds

About this 3.12ct lab-grown radiant diamond

This 3.12ct lab-grown radiant sits in the three to five carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG828684106 or 828684106. Listed at 16 retailers as of October 29, 2026, with a 305% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.2°
Pavilion angle33.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG828684106
Dimensions11.02 × 7.00 × 4.66 mm
L/W Ratio1.57
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.02 mm7.00 mm3.12 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG828684106
Side View
Table 65.0%Crown 42.2°Girdle: MED-STKPavilion 33.9°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 29
Current: £1,163 GBP|Low: £737 GBP|High: £3,079 GBP|Avg: £1,750 GBP|-5.8%
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
Retailer 14
October 29, 2026
Retailer 12£737 GBP
Retailer 9£840 GBP
Retailer 2£924 GBP
Retailer 13£1,093 GBP
Retailer 4£1,161 GBP
Retailer 1£1,163 GBP
Retailer 5£1,706 GBP
Retailer 6£1,740 GBP
Retailer 7£1,762 GBP
Retailer 14£2,299 GBP
Retailer 3£2,647 GBP
Retailer 11£2,741 GBP
Retailer 8£2,859 GBP
Retailer 10£2,983 GBP

17 data points across 14 retailers

16 retailers£737 GBP to £2,983 GBP

A+
Cheapest Retailer
-
£737 GBP
$981 USD
Final sale: no returns
A
Retailer 2
-
£840 GBP
View
A
Retailer 3
-
£924 GBP
$1,230 USD
View
A
Retailer 4
-
£1,093 GBP
$1,455 USD
View
A
Retailer 5
-
£1,161 GBP
€1,472 EUR
View
A
Retailer 6
-
£1,163 GBP
View
A
Retailer 7
-
£1,706 GBP
$2,272 USD
View
A
Retailer 8
-
£1,740 GBP
A$3,564 AUD
View
Price last confirmed 8 days ago
A
Retailer 9
-
£1,762 GBP
ZAR 37,897 ZAR
View
A
Retailer 10
-
£2,299 GBP
$3,062 USD
View
B+
Retailer 11
-
£2,476 GBP
$3,297 USD
View
B+
Retailer 12
-
£2,647 GBP
$3,525 USD
View
B+
Retailer 13
-
£2,741 GBP
$3,650 USD
View
B+
Retailer 14
-
£2,859 GBP
View
B+
Retailer 15
-
£2,983 GBP
SGD 5,368 SGD
View
Most Expensive
B+
Novita Diamonds
cert_828684106 · Oct 5
£3,613 GBP
A$7,403 AUD
View
Price last confirmed 24 days ago
15 more retailers have this diamond
Prices start from £737 GBPSave up to £2,246 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
£737 GBP