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Round|Lab Grown|IGI

0.51ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG694586400

Shape and cutting style on the report: Round brilliant

Certificate IGI LG694586400

Diamond specifications and retailer prices

From £69 GBP
As of November 5, 2026
Save £565 GBP (89%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £634 GBP at Reve Diamonds · As of November 4, 2026
View at Reve Diamonds

About this 0.51ct lab-grown round diamond

This 0.51ct lab-grown round sits in the half to three-quarter carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG694586400 or 694586400. Listed at 17 retailers as of November 4, 2026, with prices from £69 to £634, a £565 spread on the same certified stone. Reve Diamonds lists it at £634. 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

0.51
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG694586400
Dimensions5.15 × 5.16 × 3.11 mm
L/W Ratio1.00
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
5.15 mm5.16 mm0.51 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG694586400
Side View
Table 60.0%Crown 34.2°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.2%

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: Nov 5
Current: £160 GBP|Low: £66 GBP|High: £635 GBP|Avg: £210 GBP|+7.5%
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
Retailer 14
Retailer 15
Reve Diamonds
November 6, 2026
Retailer 5£69 GBP
Retailer 12£77 GBP
Retailer 7£80 GBP
Retailer 2£91 GBP
Retailer 14£91 GBP
Retailer 8£111 GBP
Retailer 1£160 GBP
Retailer 10£179 GBP
Retailer 15£180 GBP
Retailer 6£186 GBP
Retailer 13£259 GBP
Retailer 4£276 GBP
Retailer 9£308 GBP
Retailer 3£320 GBP
Retailer 11£632 GBP
Reve Diamonds£634 GBP

43 data points across 16 retailers

17 retailers£69 GBP to £634 GBP

A
Cheapest Retailer
-
£69 GBP
A
Retailer 2
-
£77 GBP
View
Final sale: no returns
A
Retailer 3
-
£80 GBP
View
Retailer 4
-
£91 GBP
View
Price last confirmed 12 days ago
A
Retailer 5
-
£91 GBP
View
A
Retailer 6
-
£111 GBP
View
A
Retailer 7
-
£160 GBP
View
B+
Retailer 8
-
£179 GBP
View
B+
Retailer 9
-
£180 GBP
View
B+
Retailer 10
-
£186 GBP
View
B+
Retailer 11
-
£202 GBP
View
B+
Retailer 12
-
£259 GBP
View
B+
Retailer 13
-
£276 GBP
View
B
Retailer 14
-
£308 GBP
View
B
Retailer 15
-
£320 GBP
View
B
Retailer 16
-
£632 GBP
View
Most Expensive
B
Reve Diamonds
FFCE2DF10 · Nov 4
£634 GBP
$853 USD
View
16 more retailers have this diamond
Prices start from £69 GBPSave up to £565 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
0.51ct Round
£69 GBP