CaratHunter
Plans
Radiant|Lab Grown|IGI

3.18ct D IF Radiant Lab Grown Diamond

VG • D/IF • IGI LG828688643

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

Certificate IGI LG828688643

Diamond specifications and retailer prices

From £1,037 GBP
$1,389 USD
As of October 29, 2026
Save £8,121 GBP (89%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £9,157 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 3.18ct lab-grown radiant diamond

This 3.18ct lab-grown radiant sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG828688643 or 828688643. Listed at 18 retailers as of October 29, 2026, with prices from £1,037 to £9,157, a £8,121 spread on the same certified stone. Brilliant Earth lists it at £9,157. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

3.18
Carat
D
Colour
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.2°
Pavilion angle38.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG828688643
Dimensions10.11 × 7.21 × 5.01 mm
L/W Ratio1.40
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.11 mm7.21 mm3.18 ctD / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG828688643
Side View
Table 70.0%Crown 43.2°Girdle: Slightly ThickPavilion 38.4°Culet: NoneDepth 69.5%

Caratlytics Score

How it works →
A
Excellent
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: £9,157 GBP|Low: £1,037 GBP|High: £9,157 GBP|Avg: £2,659 GBP
Brilliant Earth
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 30, 2026
Retailer 13£1,037 GBP
Retailer 15£1,202 GBP
Retailer 2£1,274 GBP
Retailer 17£1,317 GBP
Retailer 11£1,512 GBP
Retailer 5£1,545 GBP
Retailer 8£1,940 GBP
Retailer 6£2,068 GBP
Retailer 4£2,369 GBP
Retailer 14£2,493 GBP
Retailer 9£2,650 GBP
Retailer 7£3,134 GBP
Retailer 16£3,467 GBP
Retailer 12£3,742 GBP
Retailer 3£3,894 GBP
Retailer 10£4,006 GBP
Brilliant Earth£9,157 GBP

21 data points across 17 retailers

18 retailers£1,037 GBP to £9,157 GBP

A
Cheapest Retailer
-
£1,037 GBP
$1,389 USD
Final sale: no returns
A
Retailer 2
-
£1,202 GBP
$1,610 USD
View
A
Retailer 3
-
£1,274 GBP
View
A
Retailer 4
-
£1,317 GBP
$1,764 USD
View
A
Retailer 5
-
£1,512 GBP
View
A
Retailer 6
-
£1,545 GBP
$2,070 USD
View
Retailer 7
-
£1,940 GBP
€2,475 EUR
View
Price last confirmed 7 days ago
A
Retailer 8
-
£2,068 GBP
$2,771 USD
View
A
Retailer 9
-
£2,369 GBP
$3,174 USD
View
A
Retailer 10
-
£2,493 GBP
ZAR 53,954 ZAR
View
Retailer 11
-
£2,650 GBP
View
Price last confirmed 9 days ago
B+
Retailer 12
-
£3,134 GBP
$4,199 USD
View
B+
Retailer 13
-
£3,467 GBP
View
B+
Retailer 14
-
£3,742 GBP
$5,014 USD
View
B+
Retailer 15
-
£3,894 GBP
$5,218 USD
View
B
Retailer 16
-
£4,006 GBP
SGD 7,254 SGD
View
Retailer 17
-
£5,288 GBP
A$10,901 AUD
View
Price last confirmed 22 days ago
Most Expensive
B
Brilliant Earth
21324580A · Oct 29
£9,157 GBP
$12,270 USD
View
17 more retailers have this diamond
Prices start from £1,037 GBPSave up to £8,121 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
3.18ct Radiant
£1,037 GBP