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Emerald|Lab Grown|IGI

0.51ct D SI1 Emerald Lab Grown Diamond

ID • D/SI1 • IGI LG639433229

Shape and cutting style on the report: Emerald cut

Certificate IGI LG639433229

Diamond specifications and retailer prices

From £134 GBP
HK$1,400 HKD
As of October 29, 2026
Save £269 GBP (67%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £941 GBP at MOH London · As of October 29, 2026
View at MOH London

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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG639433229 or 639433229. Listed at 9 retailers as of October 29, 2026, with a 201% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36.5°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG639433229
Dimensions5.75 × 3.75 × 2.44 mm
L/W Ratio1.53
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
5.75 mm3.75 mm0.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG639433229
Side View
Table 63.0%Crown 36.5°Girdle: STK-THKPavilion 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 29
Current: £941 GBP|Low: £168 GBP|High: £948 GBP|Avg: £308 GBP|-0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 4£168 GBP
Retailer 3£202 GBP
Retailer 6£217 GBP
Retailer 2£232 GBP
Retailer 8£246 GBP
Retailer 7£282 GBP
Retailer 5£284 GBP
MOH London£941 GBP

42 data points across 8 retailers

9 retailers£134 GBP to £403 GBP

A
Cheapest Retailer
-
£134 GBP
HK$1,400 HKD
B+
Retailer 2
-
£168 GBP
$225 USD
View
B+
Retailer 3
-
£202 GBP
€258 EUR
View
B+
Retailer 4
-
£217 GBP
$291 USD
View
B+
Retailer 5
-
£232 GBP
View
B
Retailer 6
-
£282 GBP
$378 USD
View
B
Retailer 7
-
£284 GBP
$380 USD
View
B
Retailer 8
-
£403 GBP
$540 USD
View
Most Expensive
MOH London
LG639433229 · Oct 29
£941 GBP
View
Price under review
8 more retailers have this diamond
Prices start from £134 GBPSave up to £269 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
£134 GBP