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Emerald|Lab Grown|IGI

1.71ct E SI1 Emerald Lab Grown Diamond

GD • E/SI1 • IGI LG508141059

Shape and cutting style on the report: Emerald cut

Certificate IGI LG508141059

Diamond specifications and retailer prices

From £145 GBP
$193 USD
As of October 27, 2026
Save £884 GBP (86%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,029 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

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 E colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG508141059 or 508141059. Listed at 15 retailers as of October 27, 2026, with prices from £145 to £1,029, a £884 spread on the same certified stone. Brilliant Earth lists it at £1,029. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.71
Carat
E
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle28.4°
Pavilion angle38.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG508141059
Dimensions7.91 × 5.59 × 3.79 mm
L/W Ratio1.42
Culet sizeLong
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.91 mm5.59 mm1.71 ctE / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG508141059
Side View
Table 62.5%Crown 28.4°Girdle: Slightly ThickPavilion 38.2°Culet: LNGDepth 67.8%

Caratlytics Score

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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: Oct 27
Current: £1,029 GBP|Low: £145 GBP|High: £1,126 GBP|Avg: £499 GBP|-8.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
October 29, 2026
Retailer 3£145 GBP
Retailer 14£162 GBP
Retailer 13£168 GBP
Retailer 9£180 GBP
Retailer 7£225 GBP
Retailer 12£242 GBP
Retailer 2£327 GBP
Retailer 10£379 GBP
Retailer 8£407 GBP
Retailer 6£565 GBP
Retailer 11£578 GBP
Retailer 15£619 GBP
Retailer 5£830 GBP
Retailer 4£909 GBP
Brilliant Earth£1,029 GBP

44 data points across 15 retailers

15 retailers£145 GBP to £1,029 GBP

A
Cheapest Retailer
-
£145 GBP
$193 USD
B+
Retailer 2
-
£162 GBP
$216 USD
View
Final sale: no returns
B+
Retailer 3
-
£168 GBP
$224 USD
View
A
Retailer 4
-
£180 GBP
$240 USD
View
B+
Retailer 5
-
£225 GBP
$300 USD
View
B
Retailer 6
-
£242 GBP
$322 USD
View
B+
Retailer 7
-
£327 GBP
View
B+
Retailer 8
-
£379 GBP
$505 USD
View
B+
Retailer 9
-
£407 GBP
€516 EUR
View
B
Retailer 10
-
£565 GBP
$752 USD
View
B
Retailer 11
-
£578 GBP
$770 USD
View
B
Retailer 12
-
£619 GBP
$824 USD
View
Retailer 13
-
£830 GBP
$1,105 USD
View
Price last confirmed 11 days ago
Retailer 14
-
£909 GBP
View
Price last confirmed 10 days ago
Most Expensive
B
Brilliant Earth
11238343A · Oct 29
£1,029 GBP
$1,370 USD
View
14 more retailers have this diamond
Prices start from £145 GBPSave up to £884 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
1.71ct Emerald
£145 GBP