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Emerald|Lab Grown|IGI

1.00ct D SI1 Emerald Lab Grown Diamond

ID • D/SI1 • IGI LG523291787

Shape and cutting style on the report: Emerald cut

Certificate IGI LG523291787

Diamond specifications and retailer prices

From £105 GBP
$141 USD
As of October 29, 2026
Save £509 GBP (83%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £702 GBP at Brilliant Earth · As of October 15, 2026
View at Brilliant Earth

About this 1ct lab-grown emerald diamond

This 1ct lab-grown emerald sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG523291787 or 523291787. Listed at 17 retailers as of October 29, 2026, with a 484% 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

1.00
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle29.3°
Pavilion angle44.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG523291787
Dimensions6.56 × 4.86 × 3.22 mm
L/W Ratio1.35
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
6.56 mm4.86 mm1.00 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG523291787
Side View
Table 69.0%Crown 29.3°Girdle: MediumPavilion 44.2°Culet: LNGDepth 66.3%

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: Oct 29
Current: £702 GBP|Low: £102 GBP|High: £724 GBP|Avg: £290 GBP|-3.1%
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
October 30, 2026
Retailer 10£105 GBP
Retailer 4£118 GBP
Retailer 11£131 GBP
Retailer 12£131 GBP
Retailer 3£178 GBP
Retailer 2£224 GBP
Retailer 5£246 GBP
Retailer 8£248 GBP
Retailer 6£250 GBP
Retailer 13£313 GBP
Retailer 9£444 GBP
Retailer 7£614 GBP
Brilliant Earth£702 GBP

44 data points across 13 retailers

17 retailers£105 GBP to £614 GBP

A
Cheapest Retailer
-
£105 GBP
$141 USD
A
Retailer 2
-
£118 GBP
$158 USD
View
Final sale: no returns
A
Retailer 3
-
£122 GBP
$164 USD
View
A
Retailer 4
-
£131 GBP
$175 USD
View
A
Retailer 5
-
£131 GBP
$175 USD
View
B+
Retailer 6
-
£178 GBP
$238 USD
View
A
Retailer 7
-
£224 GBP
View
B+
Retailer 8
-
£246 GBP
$330 USD
View
A
Retailer 9
-
£248 GBP
View
B+
Retailer 10
-
£250 GBP
€319 EUR
View
B+
Retailer 11
-
£313 GBP
$420 USD
View
B+
Retailer 12
-
£385 GBP
View
B+
Retailer 13
-
£420 GBP
$563 USD
View
B
Retailer 14
-
£444 GBP
$595 USD
View
B
Retailer 15
-
£462 GBP
$619 USD
View
B
Retailer 16
-
£614 GBP
View
Most Expensive
Brilliant Earth
16211415A · Oct 15
£702 GBP
$940 USD
View
Price last confirmed 15 days ago
16 more retailers have this diamond
Prices start from £105 GBPSave up to £509 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
1.00ct Emerald
£105 GBP