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Round|Lab Grown|IGI

1.00ct E FL Round Lab Grown Diamond

ID • E/FL • IGI LG818663209

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818663209

Diamond specifications and retailer prices

From £187 GBP
$251 USD
As of October 30, 2026
Save £761 GBP (80%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £948 GBP at Reve Diamonds · As of October 30, 2026
View at Reve Diamonds

About this 1ct lab-grown round diamond

This 1ct lab-grown round sits in the classic one-carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818663209 or 818663209. Listed at 21 retailers as of October 30, 2026, with prices from £187 to £948, a £761 spread on the same certified stone. Reve Diamonds lists it at £948. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.00
Carat
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818663209
Dimensions6.48 × 6.42 × 3.93 mm
L/W Ratio1.01
Girdle conditionFaceted
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
6.48 mm6.42 mm1.00 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818663209
Side View
Table 58.0%Crown 34.1°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 61.1%

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 30
Current: £386 GBP|Low: £141 GBP|High: £1,052 GBP|Avg: £494 GBP|-2.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Reve Diamonds
October 31, 2026
Retailer 12£187 GBP
Retailer 5£219 GBP
Retailer 4£220 GBP
Retailer 9£293 GBP
Retailer 8£348 GBP
Retailer 11£352 GBP
Retailer 10£356 GBP
Retailer 1£386 GBP
Retailer 13£449 GBP
Retailer 6£537 GBP
Retailer 2£706 GBP
Retailer 3£887 GBP
Retailer 7£925 GBP
Reve Diamonds£948 GBP

33 data points across 14 retailers

21 retailers£187 GBP to £948 GBP

Retailer 1
-
£176 GBP
$236 USD
Price last confirmed 21 days ago
Retailer 2
-
£178 GBP
$238 USD
View
Price last confirmed 38 days ago
A
Retailer 3
-
£187 GBP
$251 USD
View
Final sale: no returns
Retailer 4
-
£204 GBP
$274 USD
View
Price last confirmed 22 days ago
Retailer 5
-
£206 GBP
$276 USD
View
Price last confirmed 43 days ago
Retailer 6
-
£217 GBP
$291 USD
View
Price last confirmed 36 days ago
Retailer 7
-
£219 GBP
$293 USD
View
Price last confirmed 19 days ago
Retailer 8
-
£219 GBP
$293 USD
View
Price last confirmed 29 days ago
A
Retailer 9
-
£293 GBP
$392 USD
View
A
Retailer 10
-
£348 GBP
€444 EUR
View
A
Retailer 11
-
£352 GBP
$472 USD
View
A
Retailer 12
-
£356 GBP
ZAR 7,716 ZAR
View
A
Retailer 13
-
£386 GBP
View
B+
Retailer 14
-
£449 GBP
$602 USD
View
B+
Retailer 15
-
£537 GBP
$720 USD
View
Retailer 16
-
£703 GBP
$942 USD
View
Price last confirmed 31 days ago
B
Retailer 17
-
£706 GBP
$946 USD
View
Retailer 18
-
£708 GBP
$949 USD
View
Price last confirmed 34 days ago
Retailer 19
-
£887 GBP
View
Price last confirmed 20 days ago
B
Retailer 20
-
£925 GBP
$1,240 USD
View
Most Expensive
B
Reve Diamonds
4E95EA396 · Oct 30
£948 GBP
$1,271 USD
View
20 more retailers have this diamond
Prices start from £187 GBPSave up to £761 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 Round
£187 GBP