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Round|Lab Grown|IGI

3.05ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG788632827

Shape and cutting style on the report: Round brilliant

Certificate IGI LG788632827

Diamond specifications and retailer prices

From £294 GBP
As of November 5, 2026
Save £1,638 GBP (85%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,932 GBP at Brilliant Earth · As of November 5, 2026
View at Brilliant Earth

About this 3.05ct lab-grown round diamond

This 3.05ct lab-grown round sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG788632827 or 788632827. Listed at 11 retailers as of November 5, 2026, with prices from £294 to £1,932, a £1,638 spread on the same certified stone. Brilliant Earth lists it at £1,932. 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
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.1°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG788632827
Dimensions9.47 × 9.40 × 5.63 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.47 mm9.40 mm3.05 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG788632827
Side View
Table 59.0%Crown 33.1°Girdle: THN-MEDPavilion 41°Culet: NoneDepth 59.7%

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: £1,932 GBP|Low: £281 GBP|High: £1,991 GBP|Avg: £996 GBP|-3.0%
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
November 5, 2026
Retailer 9£294 GBP
Retailer 8£330 GBP
Retailer 2£484 GBP
Retailer 11£558 GBP
Retailer 4£597 GBP
Retailer 3£632 GBP
Retailer 13£976 GBP
Retailer 12£977 GBP
Retailer 7£1,174 GBP
Retailer 5£1,186 GBP
Retailer 6£1,240 GBP
Retailer 10£1,360 GBP
Retailer 14£1,408 GBP
Brilliant Earth£1,932 GBP

29 data points across 14 retailers

11 retailers£294 GBP to £1,932 GBP

A
Cheapest Retailer
-
£294 GBP
A
Retailer 2
-
£330 GBP
View
A
Retailer 3
-
£484 GBP
View
Retailer 4
-
£558 GBP
View
Price last confirmed 8 days ago
A
Retailer 5
-
£632 GBP
View
B+
Retailer 6
-
£976 GBP
View
B
Retailer 7
-
£977 GBP
View
B+
Retailer 8
-
£1,174 GBP
View
B
Retailer 9
-
£1,360 GBP
View
Retailer 10
-
£1,408 GBP
View
Price last confirmed 24 days ago
Most Expensive
B
Brilliant Earth
20804994A · Nov 5
£1,932 GBP
$2,600 USD
View
10 more retailers have this diamond
Prices start from £294 GBPSave up to £1,638 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 Round
£294 GBP