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Emerald|Lab Grown|IGI

0.51ct G SI1 Emerald Lab Grown Diamond

ID • G/SI1 • IGI LG758555865

Shape and cutting style on the report: Emerald cut

Certificate IGI LG758555865

Diamond specifications and retailer prices

From £90 GBP
$120 USD
As of October 29, 2026
Save £309 GBP (78%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £930 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG758555865 or 758555865. Listed at 15 retailers as of October 29, 2026, with a 345% 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
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle37.5°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG758555865
Dimensions5.34 × 3.71 × 2.63 mm
L/W Ratio1.44
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
5.34 mm3.71 mm0.51 ctG / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG758555865
Side View
Table 64.0%Crown 37.5°Girdle: ThickPavilion 40.7°Culet: LargeDepth 70.9%

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 29
Current: £930 GBP|Low: £86 GBP|High: £936 GBP|Avg: £264 GBP|+0.5%
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
Retailer 15
October 31, 2026
Retailer 12£90 GBP
Retailer 4£104 GBP
Retailer 3£118 GBP
Retailer 14£118 GBP
Retailer 13£157 GBP
Retailer 10£160 GBP
Retailer 8£187 GBP
Retailer 9£200 GBP
Retailer 2£228 GBP
Retailer 7£243 GBP
Retailer 6£311 GBP
Retailer 5£337 GBP
Retailer 15£356 GBP
Retailer 11£397 GBP
MOH London£930 GBP

44 data points across 15 retailers

15 retailers£90 GBP to £399 GBP

A
Cheapest Retailer
-
£90 GBP
$120 USD
A
Retailer 2
-
£104 GBP
$139 USD
View
B+
Retailer 3
-
£118 GBP
$158 USD
View
B+
Retailer 4
-
£118 GBP
$158 USD
View
B+
Retailer 5
-
£157 GBP
$210 USD
View
B+
Retailer 6
-
£160 GBP
$215 USD
View
B+
Retailer 7
-
£187 GBP
$250 USD
View
B+
Retailer 8
-
£200 GBP
€255 EUR
View
B
Retailer 9
-
£228 GBP
View
B
Retailer 10
-
£311 GBP
SGD 563 SGD
View
B
Retailer 11
-
£337 GBP
$452 USD
View
B
Retailer 12
-
£356 GBP
$477 USD
View
B
Retailer 13
-
£397 GBP
$532 USD
View
B
Retailer 14
-
£399 GBP
$534 USD
View
Most Expensive
MOH London
LG758555865 · Oct 29
£930 GBP
View
Price under review
14 more retailers have this diamond
Prices start from £90 GBPSave up to £309 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
£90 GBP