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Emerald|Lab Grown|IGI

1.21ct F SI1 Emerald Lab Grown Diamond

ID • F/SI1 • IGI LG659456561

Shape and cutting style on the report: Emerald cut

Certificate IGI LG659456561

Diamond specifications and retailer prices

From £116 GBP
As of November 6, 2026
Save £666 GBP (85%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £782 GBP at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

About this 1.21ct lab-grown emerald diamond

This 1.21ct lab-grown emerald sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG659456561 or 659456561. Listed at 18 retailers as of November 6, 2026, with prices from £116 to £782, a £666 spread on the same certified stone. Reve Diamonds lists it at £782. 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

1.21
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.9°
Pavilion angle38.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG659456561
Dimensions7.38 × 4.94 × 3.35 mm
L/W Ratio1.49
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
7.38 mm4.94 mm1.21 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG659456561
Side View
Table 62.0%Crown 32.9°Girdle: MediumPavilion 38.9°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: Nov 6
Current: £249 GBP|Low: £116 GBP|High: £782 GBP|Avg: £333 GBP|-11.6%
Retailer 1
Retailer 2
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Retailer 4
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Retailer 11
Retailer 12
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Retailer 17
Reve Diamonds
November 6, 2026
Retailer 12£116 GBP
Retailer 6£129 GBP
Retailer 16£134 GBP
Retailer 2£143 GBP
Retailer 14£143 GBP
Retailer 9£161 GBP
Retailer 8£195 GBP
Retailer 1£249 GBP
Retailer 13£251 GBP
Retailer 4£330 GBP
Retailer 3£397 GBP
Retailer 15£462 GBP
Retailer 7£475 GBP
Retailer 17£487 GBP
Retailer 11£490 GBP
Retailer 5£502 GBP
Retailer 10£669 GBP
Reve Diamonds£782 GBP

38 data points across 18 retailers

18 retailers£116 GBP to £782 GBP

A
Cheapest Retailer
-
£116 GBP
A
Retailer 2
-
£129 GBP
View
Final sale: no returns
A
Retailer 3
-
£134 GBP
View
Retailer 4
-
£143 GBP
View
Price last confirmed 12 days ago
A
Retailer 5
-
£143 GBP
View
A
Retailer 6
-
£161 GBP
View
B+
Retailer 7
-
£195 GBP
View
A
Retailer 8
-
£249 GBP
View
Retailer 9
-
£251 GBP
View
Price last confirmed 8 days ago
A
Retailer 10
-
£330 GBP
View
B+
Retailer 11
-
£397 GBP
View
B+
Retailer 12
-
£462 GBP
View
B
Retailer 13
-
£475 GBP
View
B+
Retailer 14
-
£487 GBP
View
B
Retailer 15
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£490 GBP
View
B
Retailer 16
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£502 GBP
View
B
Retailer 17
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£669 GBP
View
Most Expensive
B
Reve Diamonds
F92EADF83 · Nov 6
£782 GBP
$1,053 USD
View
17 more retailers have this diamond
Prices start from £116 GBPSave up to £666 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
1.21ct Emerald
£116 GBP