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Emerald|Lab Grown|IGI

4.51ct D FL Emerald Lab Grown Diamond

EX • D/FL • IGI LG831603917

Shape and cutting style on the report: Emerald cut

Certificate IGI LG831603917

Diamond specifications and retailer prices

From £4,702 GBP
$6,300 USD
As of October 30, 2026
Save £16,127 GBP (77%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £20,829 GBP at With Clarity · As of October 30, 2026
View at With Clarity

About this 4.51ct lab-grown emerald diamond

This 4.51ct 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 LG831603917 or 831603917. Listed at 23 retailers as of October 30, 2026, with prices from £4,702 to £20,829, a £16,127 spread on the same certified stone. With Clarity lists it at £20,829. 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

4.51
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.2°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831603917
Dimensions11.52 × 7.77 × 4.97 mm
L/W Ratio1.48
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
11.52 mm7.77 mm4.51 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831603917
Side View
Table 59.0%Crown 37.2°Girdle: MediumPavilion 40.4°Culet: LargeDepth 64.0%

Caratlytics Score

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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: £11,270 GBP|Low: £4,702 GBP|High: £21,999 GBP|Avg: £10,135 GBP|-37.8%
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
With Clarity
October 30, 2026
Retailer 18£4,702 GBP
Retailer 10£5,139 GBP
Retailer 12£5,266 GBP
Retailer 11£5,728 GBP
Retailer 8£5,750 GBP
Retailer 6£6,034 GBP
Retailer 9£6,259 GBP
Retailer 14£6,572 GBP
Retailer 16£6,844 GBP
Retailer 19£7,780 GBP
Retailer 5£8,637 GBP
Retailer 3£9,528 GBP
Retailer 1£11,270 GBP
Retailer 4£11,558 GBP
Retailer 2£12,240 GBP
Retailer 7£13,931 GBP
Retailer 13£15,178 GBP
Retailer 17£18,892 GBP
Retailer 15£19,017 GBP
With Clarity£20,829 GBP

34 data points across 20 retailers

23 retailers£4,702 GBP to £20,829 GBP

A
Cheapest Retailer
-
£4,702 GBP
$6,300 USD
A
Retailer 2
-
£5,139 GBP
$6,886 USD
View
Retailer 3
-
£5,188 GBP
$6,951 USD
View
Price last confirmed 38 days ago
A
Retailer 4
-
£5,266 GBP
$7,056 USD
View
Final sale: no returns
A
Retailer 5
-
£5,728 GBP
$7,675 USD
View
A
Retailer 6
-
£5,750 GBP
$7,705 USD
View
Retailer 7
-
£5,750 GBP
$7,705 USD
View
Price last confirmed 14 days ago
A
Retailer 8
-
£6,034 GBP
$8,085 USD
View
B+
Retailer 9
-
£6,259 GBP
$8,387 USD
View
B+
Retailer 10
-
£6,572 GBP
HK$68,800 HKD
View
B+
Retailer 11
-
£6,827 GBP
$9,147 USD
View
B+
Retailer 12
-
£6,844 GBP
View
B+
Retailer 13
-
£7,780 GBP
View
B+
Retailer 14
-
£8,637 GBP
$11,572 USD
View
B+
Retailer 15
-
£9,528 GBP
€12,159 EUR
View
B+
Retailer 16
-
£11,270 GBP
$15,100 USD
View
B+
Retailer 17
-
£11,558 GBP
View
B+
Retailer 18
-
£12,240 GBP
ZAR 264,952 ZAR
View
B
Retailer 19
-
£13,931 GBP
$18,666 USD
View
B
Retailer 20
-
£15,178 GBP
$20,337 USD
View
B
Retailer 21
-
£18,892 GBP
$25,313 USD
View
B
Retailer 22
-
£19,017 GBP
SGD 34,434 SGD
View
Most Expensive
B
With Clarity
831603917 · Oct 30
£20,829 GBP
$27,908 USD
View
22 more retailers have this diamond
Prices start from £4,702 GBPSave up to £16,127 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
4.51ct Emerald
£4,702 GBP