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Emerald|Lab Grown|IGI

1.51ct E SI2 Emerald Lab Grown Diamond

ID • E/SI2 • IGI LG380900321

Shape and cutting style on the report: Emerald cut

Certificate IGI LG380900321

Diamond specifications and retailer prices

From £172 GBP
As of November 4, 2026
Save £481 GBP (74%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £653 GBP at Frank Darling · As of November 6, 2026
View at Frank Darling

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 E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG380900321 or 380900321. Listed at 4 retailers as of November 4, 2026, with prices from £172 to £653, a £481 spread on the same certified stone. Frank Darling lists it at £653. 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
E
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG380900321
Dimensions7.17 × 5.32 × 3.73 mm
L/W Ratio1.35
Culet sizeLong
Cert comments
This laboratory grown diamond is classified as Type II.
Top View
7.17 mm5.32 mm1.51 ctE / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG380900321
Side View
Table 63.0%CrownGirdle: MediumPavilionCulet: LNGDepth 70.1%

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 4
Current: £653 GBP|Low: £163 GBP|High: £665 GBP|Avg: £338 GBP|-1.8%
Frank Darling
Retailer 2
Retailer 3
Retailer 4
October 30, 2026
Retailer 2£172 GBP
Retailer 4£270 GBP
Retailer 3£276 GBP
Frank Darling£653 GBP

13 data points across 4 retailers

4 retailers£172 GBP to £653 GBP

A
Cheapest Retailer
-
£172 GBP
Final sale: no returns
Retailer 2
-
£270 GBP
View
Price last confirmed 8 days ago
B+
Retailer 3
-
£276 GBP
View
Most Expensive
B
Frank Darling
LGTDQ-17CG · Nov 6
£653 GBP
$879 USD
View
3 more retailers have this diamond
Prices start from £172 GBPSave up to £481 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
£172 GBP