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Round|Lab Grown|IGI

1.00ct E SI1 Round Lab Grown Diamond

EX • E/SI1 • IGI LG689561684

Shape and cutting style on the report: Round brilliant

Certificate IGI LG689561684

Diamond specifications and retailer prices

From £106 GBP
$142 USD
As of October 29, 2026
Save £648 GBP (86%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £754 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG689561684 or 689561684. Listed at 21 retailers as of October 29, 2026, with prices from £106 to £754, a £648 spread on the same certified stone. Reve Diamonds lists it at £754. 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
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.3°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG689561684
Dimensions6.54 × 6.48 × 3.81 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
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
6.54 mm6.48 mm1.00 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG689561684
Side View
Table 61.0%Crown 32.3°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 58.6%

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: Oct 29
Current: £257 GBP|Low: £102 GBP|High: £754 GBP|Avg: £283 GBP|-0.2%
Retailer 1
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Retailer 12
Retailer 13
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Retailer 17
Reve Diamonds
October 30, 2026
Retailer 7£106 GBP
Retailer 13£123 GBP
Retailer 2£132 GBP
Retailer 4£132 GBP
Retailer 15£201 GBP
Retailer 10£226 GBP
Retailer 3£245 GBP
Retailer 1£257 GBP
Retailer 12£259 GBP
Retailer 16£284 GBP
Retailer 17£314 GBP
Retailer 9£343 GBP
Retailer 5£352 GBP
Retailer 14£358 GBP
Retailer 8£424 GBP
Retailer 6£465 GBP
Retailer 11£620 GBP
Reve Diamonds£754 GBP

37 data points across 18 retailers

21 retailers£106 GBP to £754 GBP

A
Cheapest Retailer
-
£106 GBP
$142 USD
A
Retailer 2
-
£118 GBP
$158 USD
View
Final sale: no returns
A
Retailer 3
-
£123 GBP
$165 USD
View
A
Retailer 4
-
£132 GBP
$177 USD
View
A
Retailer 5
-
£132 GBP
$177 USD
View
A
Retailer 6
-
£201 GBP
$269 USD
View
B+
Retailer 7
-
£226 GBP
View
B+
Retailer 8
-
£245 GBP
$328 USD
View
B+
Retailer 9
-
£257 GBP
View
B+
Retailer 10
-
£259 GBP
€331 EUR
View
B+
Retailer 11
-
£284 GBP
$380 USD
View
Retailer 12
-
£302 GBP
$405 USD
View
Price last confirmed 88 days ago
B+
Retailer 13
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£314 GBP
$421 USD
View
B
Retailer 14
-
£343 GBP
$460 USD
View
B
Retailer 15
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£352 GBP
$472 USD
View
B+
Retailer 16
-
£358 GBP
A$738 AUD
View
Retailer 17
-
£420 GBP
$563 USD
View
Price last confirmed 39 days ago
B
Retailer 18
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£424 GBP
$568 USD
View
B
Retailer 19
-
£465 GBP
$623 USD
View
B
Retailer 20
-
£620 GBP
View
Most Expensive
B
Reve Diamonds
702A47928 · Oct 30
£754 GBP
$1,010 USD
View
20 more retailers have this diamond
Prices start from £106 GBPSave up to £648 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
£106 GBP