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Oval|Lab Grown|IGI

1.66ct E SI1 Oval Lab Grown Diamond

ID • E/SI1 • IGI LG627421853

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG627421853

Diamond specifications and retailer prices

From £227 GBP
$304 USD
As of November 1, 2026
Save £911 GBP (80%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £1,138 GBP at Reve Diamonds · As of November 1, 2026
View at Reve Diamonds

About this 1.66ct lab-grown oval diamond

This 1.66ct lab-grown oval sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG627421853 or 627421853. Listed at 20 retailers as of November 1, 2026, with prices from £227 to £1,138, a £911 spread on the same certified stone. Reve Diamonds lists it at £1,138. 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

1.66
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG627421853
Dimensions9.36 × 6.73 × 4.18 mm
L/W Ratio1.39
Girdle conditionFaceted
Culet sizePointed
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
9.36 mm6.73 mm1.66 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG627421853
Side View
Table 61.0%Crown 35°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 62.1%

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 1
Current: £360 GBP|Low: £218 GBP|High: £1,381 GBP|Avg: £599 GBP|-1.2%
Retailer 1
Retailer 2
Retailer 3
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Retailer 5
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Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
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Retailer 16
Reve Diamonds
November 2, 2026
Retailer 14£227 GBP
Retailer 8£253 GBP
Retailer 4£263 GBP
Retailer 15£281 GBP
Retailer 1£360 GBP
Retailer 3£396 GBP
Retailer 16£425 GBP
Retailer 11£458 GBP
Retailer 7£459 GBP
Retailer 9£495 GBP
Retailer 12£508 GBP
Retailer 6£725 GBP
Retailer 5£731 GBP
Retailer 2£903 GBP
Retailer 13£940 GBP
Retailer 10£1,126 GBP
Reve Diamonds£1,138 GBP

36 data points across 17 retailers

20 retailers£227 GBP to £1,138 GBP

A
Cheapest Retailer
-
£227 GBP
$304 USD
A
Retailer 2
-
£253 GBP
$339 USD
View
Final sale: no returns
A
Retailer 3
-
£263 GBP
$352 USD
View
A
Retailer 4
-
£281 GBP
$377 USD
View
Retailer 5
-
£281 GBP
$377 USD
View
Price last confirmed 17 days ago
A
Retailer 6
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£360 GBP
View
A
Retailer 7
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£396 GBP
$530 USD
View
A
Retailer 8
-
£425 GBP
$569 USD
View
B+
Retailer 9
-
£458 GBP
€584 EUR
View
B+
Retailer 10
-
£459 GBP
$615 USD
View
B+
Retailer 11
-
£495 GBP
View
B+
Retailer 12
-
£508 GBP
A$1,048 AUD
View
B+
Retailer 13
-
£534 GBP
$716 USD
View
B+
Retailer 14
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£725 GBP
$971 USD
View
Retailer 15
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£731 GBP
$980 USD
View
Price last confirmed 11 days ago
B
Retailer 16
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£903 GBP
$1,210 USD
View
B
Retailer 17
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£939 GBP
$1,258 USD
View
B
Retailer 18
-
£940 GBP
$1,260 USD
View
B
Retailer 19
-
£1,126 GBP
View
Most Expensive
B
Reve Diamonds
D564D4A9A · Nov 1
£1,138 GBP
$1,524 USD
View
19 more retailers have this diamond
Prices start from £227 GBPSave up to £911 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
1.66ct Oval
£227 GBP