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Emerald|Lab Grown|IGI

1.31ct G SI1 Emerald Lab Grown Diamond

ID • G/SI1 • IGI LG500165050

Shape and cutting style on the report: Emerald cut

Certificate IGI LG500165050

Diamond specifications and retailer prices

From £579 GBP
As of November 6, 2026
Save £1,019 GBP (64%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,889 GBP at NZ Jewellers · As of November 6, 2026
View at NZ Jewellers

About this 1.31ct lab-grown emerald diamond

This 1.31ct lab-grown emerald sits in the one-and-a-quarter to one-and-a-half carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG500165050 or 500165050. Listed at 12 retailers as of November 4, 2026, with a 176% 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

1.31
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle20.5°
Pavilion angle34.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG500165050
Dimensions7.45 × 5.22 × 3.43 mm
L/W Ratio1.43
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
7.45 mm5.22 mm1.31 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG500165050
Side View
Table 62.0%Crown 20.5°Girdle: MED-STKPavilion 34.6°Culet: LNGDepth 65.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £1,889 GBP|Low: £556 GBP|High: £2,548 GBP|Avg: £1,046 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 9£579 GBP
Retailer 3£630 GBP
Retailer 4£648 GBP
Retailer 10£672 GBP
Retailer 12£672 GBP
Retailer 7£802 GBP
Retailer 6£810 GBP
Retailer 2£1,019 GBP
Retailer 11£1,084 GBP
Retailer 8£1,597 GBP
NZ Jewellers£1,889 GBP
Retailer 5£2,511 GBP

45 data points across 12 retailers

12 retailers£579 GBP to £1,597 GBP

B+
Cheapest Retailer
-
£579 GBP
B
Retailer 2
-
£630 GBP
View
B
Retailer 3
-
£648 GBP
View
Final sale: no returns
B
Retailer 4
-
£672 GBP
View
Retailer 5
-
£672 GBP
View
Price last confirmed 25 days ago
B
Retailer 6
-
£802 GBP
View
B
Retailer 7
-
£810 GBP
View
B
Retailer 8
-
£1,019 GBP
View
B
Retailer 9
-
£1,084 GBP
View
B
Retailer 10
-
£1,597 GBP
View
Most Expensive
NZ Jewellers
308baf7e-0b47-491c-8005-f0d63857c6bd · Nov 6
£1,889 GBP
$2,542 USD
View
Price under review
10 more retailers have this diamond
Prices start from £579 GBPSave up to £1,019 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.

B+
1.31ct Emerald
£579 GBP