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Emerald|Lab Grown|IGI

1.51ct I SI1 Emerald Lab Grown Diamond

ID • I/SI1 • IGI LG499108039

Shape and cutting style on the report: Emerald cut

Certificate IGI LG499108039

Diamond specifications and retailer prices

From £627 GBP
$840 USD
As of October 30, 2026
Save £1,490 GBP (70%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,647 GBP at MOH London · As of October 21, 2026
View at MOH London

About this 1.51ct lab-grown emerald diamond

This 1.51ct lab-grown emerald sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG499108039 or 499108039. Listed at 10 retailers as of October 28, 2026, with a 238% 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

1.51
Carat
I
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle23.7°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG499108039
Dimensions8.18 × 5.34 × 3.37 mm
L/W Ratio1.53
Culet sizeLong
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.18 mm5.34 mm1.51 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG499108039
Side View
Table 65.0%Crown 23.7°Girdle: Slightly ThickPavilion 40.9°Culet: LNGDepth 63.1%

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 30
Current: £3,647 GBP|Low: £627 GBP|High: £3,672 GBP|Avg: £1,610 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
October 30, 2026
Retailer 2£627 GBP
Retailer 4£973 GBP
Retailer 9£1,059 GBP
Retailer 5£1,129 GBP
Retailer 8£1,129 GBP
Retailer 11£1,258 GBP
Retailer 3£1,555 GBP
Retailer 6£1,786 GBP
Retailer 10£2,105 GBP
Retailer 7£2,117 GBP
MOH London£3,647 GBP

14 data points across 11 retailers

10 retailers£627 GBP to £2,117 GBP

A
Cheapest Retailer
-
£627 GBP
$840 USD
B
Retailer 2
-
£973 GBP
$1,304 USD
View
B
Retailer 3
-
£1,059 GBP
$1,419 USD
View
Retailer 4
-
£1,129 GBP
$1,513 USD
View
Price last confirmed 17 days ago
B
Retailer 5
-
£1,129 GBP
$1,513 USD
View
B
Retailer 6
-
£1,258 GBP
$1,685 USD
View
B
Retailer 7
-
£1,786 GBP
$2,393 USD
View
B
Retailer 8
-
£2,105 GBP
$2,820 USD
View
B
Retailer 9
-
£2,117 GBP
$2,836 USD
View
Most Expensive
MOH London
LG499108039 · Oct 21
£3,647 GBP
View
Price last confirmed 9 days ago
9 more retailers have this diamond
Prices start from £627 GBPSave up to £1,490 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
1.51ct Emerald
£627 GBP