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Radiant|Lab Grown|IGI

3.40ct J VS1 Radiant Lab Grown Diamond

ID • J/VS1 • IGI LG848699114

Shape and cutting style on the report: Cut cornered rectangular mixed cut

Certificate IGI LG848699114

Diamond specifications and retailer prices

From £1,025 GBP
As of November 6, 2026
Save £2,006 GBP (66%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £3,031 GBP at Taylor and Hart · As of November 6, 2026
View at Taylor and Hart

About this 3.4ct lab-grown radiant diamond

This 3.4ct lab-grown radiant sits in the three to five carat band, graded J colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG848699114 or 848699114. Listed at 5 retailers as of November 6, 2026, with prices from £1,025 to £3,031, a £2,006 spread on the same certified stone. Taylor and Hart lists it at £3,031. 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

3.40
Carat
J
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38°
Pavilion angle30.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG848699114
Dimensions10.00 × 7.31 × 4.98 mm
L/W Ratio1.37
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa Light Green
Top View
10.00 mm7.31 mm3.40 ctJ / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG848699114
Side View
Table 59.0%Crown 38°Girdle: Slightly ThickPavilion 30.7°Culet: NoneDepth 68.1%

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: Nov 6
Current: £1,025 GBP|Low: £986 GBP|High: £3,031 GBP|Avg: £1,816 GBP|+3.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Taylor and Hart
November 6, 2026
Retailer 1£1,025 GBP
Retailer 2£1,212 GBP
Retailer 4£1,752 GBP
Retailer 3£2,873 GBP
Taylor and Hart£3,031 GBP

8 data points across 5 retailers

5 retailers£1,025 GBP to £3,031 GBP

A
Cheapest Retailer
-
£1,025 GBP
B+
Retailer 2
-
£1,212 GBP
View
B+
Retailer 3
-
£1,752 GBP
View
B
Retailer 4
-
£2,873 GBP
View
Most Expensive
C
Taylor and Hart
XZJ4MMJ · Nov 6
£3,031 GBP
$4,056 USD
View
4 more retailers have this diamond
Prices start from £1,025 GBPSave up to £2,006 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
3.40ct Radiant
£1,025 GBP