Emerald|Lab Grown|IGI

0.51ct D FL Emerald Lab Grown Diamond

VG • D/FL • IGI LG816658211

Shape and cutting style on the report: Emerald cut

Certificate IGI LG816658211

Diamond specifications and retailer prices

From £173 GBP
$232 USD
As of October 29, 2026
Save £793 GBP (82%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £1,281 GBP at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 0.51ct lab-grown emerald diamond

This 0.51ct lab-grown emerald sits in the half to three-quarter carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG816658211 or 816658211. Listed at 17 retailers as of October 29, 2026, with a 458% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

0.51
Carat
D
Colour
FL
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.8°
Pavilion angle45.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816658211
Dimensions5.44 × 3.73 × 2.57 mm
L/W Ratio1.46
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
5.44 mm3.73 mm0.51 ctD / FL
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816658211
Side View
Table 66.0%Crown 36.8°Girdle: MediumPavilion 45.7°Culet: LargeDepth 68.9%

Caratlytics Score

How it works →
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 29
Current: £1,281 GBP|Low: £173 GBP|High: £1,281 GBP|Avg: £540 GBP|+9.2%
Blue Nile
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
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Retailer 16
Retailer 17
October 30, 2026
Retailer 17£173 GBP
Retailer 16£193 GBP
Retailer 15£201 GBP
Retailer 8£212 GBP
Retailer 11£215 GBP
Retailer 9£291 GBP
Retailer 7£295 GBP
Retailer 2£336 GBP
Retailer 13£429 GBP
Retailer 5£429 GBP
Retailer 10£451 GBP
Retailer 6£691 GBP
Retailer 12£762 GBP
Retailer 3£889 GBP
Retailer 4£954 GBP
Retailer 14£966 GBP
Blue Nile£1,281 GBP

26 data points across 17 retailers

17 retailers£173 GBP to £966 GBP

A
Cheapest Retailer
-
£173 GBP
$232 USD
A
Retailer 2
-
£193 GBP
$259 USD
View
Final sale: no returns
A
Retailer 3
-
£201 GBP
$269 USD
View
A
Retailer 4
-
£212 GBP
$284 USD
View
A
Retailer 5
-
£215 GBP
$288 USD
View
B+
Retailer 6
-
£291 GBP
$390 USD
View
B+
Retailer 7
-
£295 GBP
$395 USD
View
B+
Retailer 8
-
£336 GBP
$450 USD
View
B
Retailer 9
-
£429 GBP
ZAR 9,282 ZAR
View
B
Retailer 10
-
£429 GBP
$575 USD
View
B
Retailer 11
-
£451 GBP
€576 EUR
View
B
Retailer 12
-
£691 GBP
CA$1,285 CAD
View
B
Retailer 13
-
£762 GBP
$1,021 USD
View
B
Retailer 14
-
£889 GBP
$1,191 USD
View
B
Retailer 15
-
£954 GBP
View
B
Retailer 16
-
£966 GBP
$1,295 USD
View
Most Expensive
Blue Nile
30303461 · Oct 31
£1,281 GBP
$1,717 USD
View
Price under review
16 more retailers have this diamond
Prices start from £173 GBPSave up to £793 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
0.51ct Emerald
£173 GBP