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Emerald|Lab Grown|IGI

0.51ct D SI1 Emerald Lab Grown Diamond

ID • D/SI1 • IGI LG674550365

Shape and cutting style on the report: Emerald cut

Certificate IGI LG674550365

Diamond specifications and retailer prices

From £79 GBP
$105 USD
As of October 29, 2026
Save £742 GBP (90%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £821 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 LG674550365 or 674550365. Listed at 14 retailers as of October 29, 2026, with prices from £79 to £821, a £742 spread on the same certified stone. MOH London lists it at £821. 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
SymmetryExcellent
FluorescenceNone
Crown angle32.3°
Pavilion angle38.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG674550365
Dimensions5.55 × 3.84 × 2.48 mm
L/W Ratio1.45
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
5.55 mm3.84 mm0.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG674550365
Side View
Table 59.0%Crown 32.3°Girdle: MediumPavilion 38.1°Culet: LargeDepth 64.6%

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: £821 GBP|Low: £76 GBP|High: £827 GBP|Avg: £234 GBP|+0.6%
MOH London
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
October 30, 2026
Retailer 12£79 GBP
Retailer 3£92 GBP
Retailer 11£104 GBP
Retailer 13£104 GBP
Retailer 4£173 GBP
Retailer 2£193 GBP
Retailer 10£196 GBP
Retailer 5£197 GBP
Retailer 7£236 GBP
Retailer 6£271 GBP
Retailer 8£285 GBP
Retailer 14£315 GBP
Retailer 9£351 GBP
MOH London£821 GBP

45 data points across 14 retailers

14 retailers£79 GBP to £821 GBP

A
Cheapest Retailer
-
£79 GBP
$105 USD
A
Retailer 2
-
£92 GBP
$122 USD
View
A
Retailer 3
-
£104 GBP
$139 USD
View
A
Retailer 4
-
£104 GBP
$139 USD
View
Retailer 5
-
£173 GBP
$230 USD
View
Price last confirmed 22 days ago
B+
Retailer 6
-
£193 GBP
View
B+
Retailer 7
-
£196 GBP
€249 EUR
View
B+
Retailer 8
-
£197 GBP
$262 USD
View
B+
Retailer 9
-
£236 GBP
View
B
Retailer 10
-
£271 GBP
$361 USD
View
B
Retailer 11
-
£285 GBP
$380 USD
View
B
Retailer 12
-
£315 GBP
$419 USD
View
B
Retailer 13
-
£351 GBP
$467 USD
View
Most Expensive
B
MOH London
LG674550365 · Oct 29
£821 GBP
View
13 more retailers have this diamond
Prices start from £79 GBPSave up to £742 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
£79 GBP