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Emerald|Lab Grown|IGI

1.71ct G SI1 Emerald Lab Grown Diamond

ID • G/SI1 • IGI LG512202794

Shape and cutting style on the report: Emerald cut

Certificate IGI LG512202794

Diamond specifications and retailer prices

From £1,311 GBP
$1,757 USD
As of October 30, 2026
Save £1,248 GBP (49%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,852 GBP at NZ Jewellers · As of October 28, 2026
View at NZ Jewellers

About this 1.71ct lab-grown emerald diamond

This 1.71ct lab-grown emerald sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG512202794 or 512202794. Listed at 11 retailers as of October 26, 2026, with a 95% 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

1.71
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle21.2°
Pavilion angle33°
OriginLab Grown
Grading LabIGI
CertificateIGI LG512202794
Dimensions8.50 × 5.46 × 3.43 mm
L/W Ratio1.56
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
8.50 mm5.46 mm1.71 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG512202794
Side View
Table 64.5%Crown 21.2°Girdle: ThickPavilion 33°Culet: LNGDepth 62.8%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £2,852 GBP|Low: £1,259 GBP|High: £4,403 GBP|Avg: £2,062 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 6£1,311 GBP
Retailer 11£1,427 GBP
Retailer 7£1,448 GBP
Retailer 8£1,521 GBP
Retailer 10£1,521 GBP
Retailer 3£1,646 GBP
Retailer 2£2,152 GBP
Retailer 9£2,388 GBP
Retailer 5£2,559 GBP
NZ Jewellers£2,852 GBP
Retailer 4£4,368 GBP

43 data points across 11 retailers

11 retailers£1,311 GBP to £2,559 GBP

B
Cheapest Retailer
-
£1,311 GBP
$1,757 USD
B
Retailer 2
-
£1,427 GBP
$1,912 USD
View
B
Retailer 3
-
£1,448 GBP
$1,940 USD
View
B
Retailer 4
-
£1,521 GBP
$2,038 USD
View
Retailer 5
-
£1,521 GBP
$2,038 USD
View
Price last confirmed 18 days ago
B
Retailer 6
-
£1,646 GBP
$2,205 USD
View
B
Retailer 7
-
£2,152 GBP
View
Retailer 8
-
£2,388 GBP
$3,199 USD
View
Price last confirmed 7 days ago
B
Retailer 9
-
£2,559 GBP
$3,429 USD
View
Most Expensive
NZ Jewellers
8caf2534-91a7-4992-b0cd-35657cde6806 · Oct 28
£2,852 GBP
$3,821 USD
View
Price under review
9 more retailers have this diamond
Prices start from £1,311 GBPSave up to £1,248 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
1.71ct Emerald
£1,311 GBP