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Emerald|Lab Grown|IGI

1.51ct I VS1 Emerald Lab Grown Diamond

ID • I/VS1 • IGI LG621455172

Shape and cutting style on the report: Emerald cut

Certificate IGI LG621455172

Diamond specifications and retailer prices

From £342 GBP
$459 USD
As of November 1, 2026
Save £664 GBP (66%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,006 GBP at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

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 VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG621455172 or 621455172. Listed at 7 retailers as of November 1, 2026, with prices from £342 to £1,006, a £664 spread on the same certified stone. Brilliant Earth lists it at £1,006. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
I
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.8°
Pavilion angle39.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG621455172
Dimensions8.45 × 5.23 × 3.40 mm
L/W Ratio1.62
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
8.45 mm5.23 mm1.51 ctI / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG621455172
Side View
Table 65.0%Crown 38.8°Girdle: MediumPavilion 39.4°Culet: LNGDepth 65.0%

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: Nov 1
Current: £1,006 GBP|Low: £342 GBP|High: £1,043 GBP|Avg: £585 GBP|-3.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 4£342 GBP
Retailer 3£376 GBP
Retailer 5£381 GBP
Retailer 6£468 GBP
Retailer 7£601 GBP
Retailer 8£765 GBP
Retailer 2£906 GBP
Brilliant Earth£1,006 GBP

19 data points across 8 retailers

7 retailers£342 GBP to £1,006 GBP

A
Cheapest Retailer
-
£342 GBP
$459 USD
A
Retailer 2
-
£376 GBP
€481 EUR
View
A
Retailer 3
-
£381 GBP
$511 USD
View
B+
Retailer 4
-
£468 GBP
$628 USD
View
B
Retailer 5
-
£765 GBP
$1,027 USD
View
B
Retailer 6
-
£906 GBP
View
Most Expensive
B
Brilliant Earth
20918481A · Nov 2
£1,006 GBP
$1,350 USD
View
6 more retailers have this diamond
Prices start from £342 GBPSave up to £664 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
£342 GBP