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Emerald|Lab Grown|IGI

4.20ct D FL Emerald Lab Grown Diamond

EX • D/FL • IGI LG823694940

Shape and cutting style on the report: Emerald cut

Certificate IGI LG823694940

Diamond specifications and retailer prices

From £3,558 GBP
$4,767 USD
As of October 30, 2026
Save £11,224 GBP (76%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £14,782 GBP at Taylor and Hart · As of October 30, 2026
View at Taylor and Hart

About this 4.2ct lab-grown emerald diamond

This 4.2ct lab-grown emerald sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG823694940 or 823694940. Listed at 21 retailers as of October 30, 2026, with prices from £3,558 to £14,782, a £11,224 spread on the same certified stone. Taylor and Hart lists it at £14,782. 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

4.20
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG823694940
Dimensions11.32 × 7.43 × 4.84 mm
L/W Ratio1.52
Culet sizeLarge
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
11.32 mm7.43 mm4.20 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG823694940
Side View
Table 66.0%Crown 33.9°Girdle: MediumPavilion 40.3°Culet: LargeDepth 65.1%

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: £10,613 GBP|Low: £3,729 GBP|High: £16,812 GBP|Avg: £7,995 GBP|-35.7%
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
Retailer 15
Retailer 16
Taylor and Hart
October 30, 2026
Retailer 16£3,729 GBP
Retailer 4£3,984 GBP
Retailer 15£4,150 GBP
Retailer 3£4,693 GBP
Retailer 5£4,910 GBP
Retailer 9£5,254 GBP
Retailer 14£5,271 GBP
Retailer 6£5,835 GBP
Retailer 2£6,380 GBP
Retailer 11£6,750 GBP
Retailer 12£8,590 GBP
Retailer 10£8,783 GBP
Retailer 13£9,869 GBP
Retailer 1£10,613 GBP
Retailer 7£11,471 GBP
Retailer 8£14,225 GBP
Taylor and Hart£14,782 GBP

39 data points across 17 retailers

21 retailers£3,558 GBP to £14,782 GBP

A
Cheapest Retailer
-
£3,558 GBP
$4,767 USD
A
Retailer 2
-
£3,729 GBP
$4,996 USD
View
A
Retailer 3
-
£3,984 GBP
$5,338 USD
View
Final sale: no returns
A
Retailer 4
-
£4,126 GBP
$5,529 USD
View
Retailer 5
-
£4,126 GBP
$5,529 USD
View
Price last confirmed 14 days ago
A
Retailer 6
-
£4,150 GBP
$5,560 USD
View
A
Retailer 7
-
£4,693 GBP
$6,288 USD
View
A
Retailer 8
-
£4,910 GBP
HK$51,400 HKD
View
A
Retailer 9
-
£5,157 GBP
$6,910 USD
View
A
Retailer 10
-
£5,254 GBP
View
A
Retailer 11
-
£5,271 GBP
$7,062 USD
View
B+
Retailer 12
-
£5,835 GBP
View
B+
Retailer 13
-
£6,380 GBP
$8,548 USD
View
B+
Retailer 14
-
£6,750 GBP
€8,613 EUR
View
B+
Retailer 15
-
£8,590 GBP
View
B+
Retailer 16
-
£8,783 GBP
ZAR 190,118 ZAR
View
B+
Retailer 17
-
£9,869 GBP
$13,223 USD
View
B+
Retailer 18
-
£10,613 GBP
$14,220 USD
View
B
Retailer 19
-
£11,471 GBP
$15,370 USD
View
B
Retailer 20
-
£14,225 GBP
SGD 25,757 SGD
View
Most Expensive
B
Taylor and Hart
AQMGJ0B · Oct 30
£14,782 GBP
$19,806 USD
View
20 more retailers have this diamond
Prices start from £3,558 GBPSave up to £11,224 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
4.20ct Emerald
£3,558 GBP