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Oval|Lab Grown|IGI

3.05ct F SI1 Oval Lab Grown Diamond

ID • F/SI1 • IGI LG678584148

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG678584148

Diamond specifications and retailer prices

From £317 GBP
As of November 6, 2026
Save £2,993 GBP (90%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £3,310 GBP at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

About this 3.05ct lab-grown oval diamond

This 3.05ct lab-grown oval sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG678584148 or 678584148. Listed at 17 retailers as of November 6, 2026, with prices from £317 to £3,310, a £2,993 spread on the same certified stone. Brilliant Earth lists it at £3,310. 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

3.05
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG678584148
Dimensions11.45 × 8.26 × 5.07 mm
L/W Ratio1.39
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.45 mm8.26 mm3.05 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG678584148
Side View
Table 61.0%Crown 35.6°Girdle: MediumPavilion 40.1°Culet: NoneDepth 61.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £3,310 GBP|Low: £317 GBP|High: £3,310 GBP|Avg: £886 GBP
Brilliant Earth
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
November 6, 2026
Retailer 7£317 GBP
Retailer 6£355 GBP
Retailer 12£367 GBP
Retailer 13£393 GBP
Retailer 4£501 GBP
Retailer 15£527 GBP
Retailer 14£618 GBP
Retailer 8£641 GBP
Retailer 2£656 GBP
Retailer 5£779 GBP
Retailer 10£1,102 GBP
Retailer 3£1,263 GBP
Retailer 9£1,397 GBP
Retailer 11£1,443 GBP
Brilliant Earth£3,310 GBP

45 data points across 15 retailers

17 retailers£317 GBP to £3,310 GBP

A
Cheapest Retailer
-
£317 GBP
A
Retailer 2
-
£355 GBP
View
A
Retailer 3
-
£367 GBP
View
Final sale: no returns
A
Retailer 4
-
£393 GBP
View
Retailer 5
-
£410 GBP
View
Price last confirmed 12 days ago
A
Retailer 6
-
£501 GBP
View
B+
Retailer 7
-
£527 GBP
View
A
Retailer 8
-
£618 GBP
View
A
Retailer 9
-
£641 GBP
View
A
Retailer 10
-
£656 GBP
View
A
Retailer 11
-
£779 GBP
View
B+
Retailer 12
-
£953 GBP
View
B+
Retailer 13
-
£1,102 GBP
View
B+
Retailer 14
-
£1,263 GBP
View
B+
Retailer 15
-
£1,397 GBP
View
B+
Retailer 16
-
£1,443 GBP
View
Most Expensive
B
Brilliant Earth
17470500A · Nov 6
£3,310 GBP
$4,430 USD
View
16 more retailers have this diamond
Prices start from £317 GBPSave up to £2,993 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
3.05ct Oval
£317 GBP