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Emerald|Lab Grown|IGI

4.28ct D FL Emerald Lab Grown Diamond

ID • D/FL • IGI LG821641255

Shape and cutting style on the report: Emerald cut

Certificate IGI LG821641255

Diamond specifications and retailer prices

From £3,800 GBP
$5,091 USD
As of October 30, 2026
Save £17,704 GBP (82%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £21,504 GBP at With Clarity · As of October 30, 2026
View at With Clarity

About this 4.28ct lab-grown emerald diamond

This 4.28ct 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 LG821641255 or 821641255. Listed at 14 retailers as of October 30, 2026, with prices from £3,800 to £21,504, a £17,704 spread on the same certified stone. With Clarity lists it at £21,504. 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

4.28
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle39.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821641255
Dimensions11.21 × 7.51 × 4.96 mm
L/W Ratio1.49
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
11.21 mm7.51 mm4.28 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG821641255
Side View
Table 62.0%Crown 36.4°Girdle: MediumPavilion 39.4°Culet: LargeDepth 66.0%

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 30
Current: £9,090 GBP|Low: £3,800 GBP|High: £24,952 GBP|Avg: £10,033 GBP|-46.0%
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
With Clarity
October 30, 2026
Retailer 11£3,800 GBP
Retailer 13£4,800 GBP
Retailer 12£5,092 GBP
Retailer 6£5,258 GBP
Retailer 5£6,083 GBP
Retailer 4£6,243 GBP
Retailer 8£6,661 GBP
Retailer 2£7,586 GBP
Retailer 9£8,419 GBP
Retailer 7£8,607 GBP
Retailer 1£9,090 GBP
Retailer 3£10,921 GBP
Retailer 10£14,471 GBP
With Clarity£21,504 GBP

41 data points across 14 retailers

14 retailers£3,800 GBP to £21,504 GBP

A
Cheapest Retailer
-
£3,800 GBP
$5,091 USD
A
Retailer 2
-
£4,800 GBP
$6,432 USD
View
A
Retailer 3
-
£5,092 GBP
HK$53,300 HKD
View
A
Retailer 4
-
£5,258 GBP
View
Retailer 5
-
£6,083 GBP
$8,150 USD
View
Price last confirmed 12 days ago
B+
Retailer 6
-
£6,243 GBP
$8,365 USD
View
B+
Retailer 7
-
£6,661 GBP
€8,500 EUR
View
B+
Retailer 8
-
£7,586 GBP
$10,164 USD
View
B+
Retailer 9
-
£8,419 GBP
View
B+
Retailer 10
-
£8,607 GBP
ZAR 186,315 ZAR
View
B+
Retailer 11
-
£9,090 GBP
$12,180 USD
View
B
Retailer 12
-
£10,921 GBP
$14,632 USD
View
B
Retailer 13
-
£14,471 GBP
$19,390 USD
View
Most Expensive
B
With Clarity
821641255 · Oct 30
£21,504 GBP
$28,813 USD
View
13 more retailers have this diamond
Prices start from £3,800 GBPSave up to £17,704 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
4.28ct Emerald
£3,800 GBP