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Oval|Lab Grown|IGI

1.66ct E VS1 Oval Lab Grown Diamond

EX • E/VS1 • IGI LG823666729

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG823666729

Diamond specifications and retailer prices

From £283 GBP
$379 USD
As of October 29, 2026
Save £1,240 GBP (81%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £1,523 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

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 VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG823666729 or 823666729. Listed at 24 retailers as of October 29, 2026, with prices from £283 to £1,523, a £1,240 spread on the same certified stone. Brilliant Earth lists it at £1,523. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.66
Carat
E
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG823666729
Dimensions9.11 × 7.04 × 4.25 mm
L/W Ratio1.29
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.11 mm7.04 mm1.66 ctE / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG823666729
Side View
Table 61.0%Crown 33.7°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 60.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £1,523 GBP|Low: £283 GBP|High: £1,597 GBP|Avg: £801 GBP|-4.7%
Brilliant Earth
Retailer 2
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Retailer 22
October 31, 2026
Retailer 14£283 GBP
Retailer 7£316 GBP
Retailer 9£316 GBP
Retailer 3£351 GBP
Retailer 4£351 GBP
Retailer 21£463 GBP
Retailer 10£470 GBP
Retailer 6£487 GBP
Retailer 13£561 GBP
Retailer 15£571 GBP
Retailer 20£602 GBP
Retailer 16£634 GBP
Retailer 18£814 GBP
Retailer 17£864 GBP
Retailer 22£879 GBP
Retailer 12£1,116 GBP
Retailer 5£1,127 GBP
Retailer 8£1,156 GBP
Retailer 2£1,224 GBP
Retailer 11£1,317 GBP
Retailer 19£1,377 GBP
Brilliant Earth£1,523 GBP

28 data points across 22 retailers

24 retailers£283 GBP to £1,523 GBP

A
Cheapest Retailer
-
£283 GBP
$379 USD
A
Retailer 2
-
£316 GBP
$424 USD
View
Final sale: no returns
A
Retailer 3
-
£316 GBP
$424 USD
View
A
Retailer 4
-
£351 GBP
$470 USD
View
A
Retailer 5
-
£351 GBP
$470 USD
View
A
Retailer 6
-
£463 GBP
$620 USD
View
A
Retailer 7
-
£470 GBP
$630 USD
View
A
Retailer 8
-
£487 GBP
$652 USD
View
A
Retailer 9
-
£561 GBP
€716 EUR
View
B+
Retailer 10
-
£571 GBP
A$1,178 AUD
View
B+
Retailer 11
-
£602 GBP
ZAR 13,041 ZAR
View
B+
Retailer 12
-
£634 GBP
View
B+
Retailer 13
-
£814 GBP
A$1,677 AUD
View
Retailer 14
-
£836 GBP
$1,120 USD
View
Price last confirmed 52 days ago
B+
Retailer 15
-
£864 GBP
A$1,782 AUD
View
B
Retailer 16
-
£879 GBP
$1,178 USD
View
Retailer 17
-
£1,071 GBP
$1,435 USD
View
Price last confirmed 37 days ago
B
Retailer 18
-
£1,116 GBP
SGD 2,020 SGD
View
B
Retailer 19
-
£1,127 GBP
$1,510 USD
View
B
Retailer 20
-
£1,156 GBP
$1,548 USD
View
B
Retailer 21
-
£1,224 GBP
$1,640 USD
View
B
Retailer 22
-
£1,317 GBP
$1,764 USD
View
B
Retailer 23
-
£1,377 GBP
View
Most Expensive
B
Brilliant Earth
21127214A · Oct 31
£1,523 GBP
$2,040 USD
View
23 more retailers have this diamond
Prices start from £283 GBPSave up to £1,240 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
£283 GBP