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Round|Lab Grown|IGI

1.05ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG670428283

Shape and cutting style on the report: Round brilliant

Certificate IGI LG670428283

Diamond specifications and retailer prices

From £109 GBP
As of November 5, 2026
Save £652 GBP (86%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £761 GBP at Reve Diamonds · As of November 4, 2026
View at Reve Diamonds

About this 1.05ct lab-grown round diamond

This 1.05ct lab-grown round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG670428283 or 670428283. Listed at 24 retailers as of November 4, 2026, with prices from £109 to £761, a £652 spread on the same certified stone. Reve Diamonds lists it at £761. 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

1.05
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG670428283
Dimensions6.58 × 6.56 × 3.99 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
HEARTS & ARROWS This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.58 mm6.56 mm1.05 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG670428283
Side View
Table 58.0%Crown 33.9°Girdle: MediumPavilion 41°Culet: NoneDepth 60.8%

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: Nov 5
Current: £231 GBP|Low: £105 GBP|High: £640 GBP|Avg: £294 GBP|+3.7%
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
November 6, 2026
Retailer 11£109 GBP
Retailer 7£122 GBP
Retailer 13£126 GBP
Retailer 2£135 GBP
Retailer 5£184 GBP
Retailer 1£231 GBP
Retailer 10£256 GBP
Retailer 6£265 GBP
Retailer 9£293 GBP
Retailer 12£435 GBP
Retailer 4£460 GBP
Retailer 3£483 GBP
Retailer 8£631 GBP

40 data points across 13 retailers

24 retailers£109 GBP to £761 GBP

A
Cheapest Retailer
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£109 GBP
A
Retailer 2
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£122 GBP
View
Final sale: no returns
A
Retailer 3
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£126 GBP
View
Retailer 4
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£134 GBP
View
Price last confirmed 66 days ago
Retailer 5
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£135 GBP
View
Price last confirmed 12 days ago
A
Retailer 6
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£135 GBP
View
B+
Retailer 7
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£184 GBP
View
A
Retailer 8
-
£219 GBP
View
A
Retailer 9
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£231 GBP
View
B+
Retailer 10
-
£256 GBP
View
A
Retailer 11
-
£265 GBP
View
B+
Retailer 12
-
£293 GBP
View
B+
Retailer 13
-
£293 GBP
View
B+
Retailer 14
-
£293 GBP
View
B+
Retailer 15
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£293 GBP
View
B+
Retailer 16
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£305 GBP
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B+
Retailer 17
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£305 GBP
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Retailer 18
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£318 GBP
View
Price last confirmed 11 days ago
B
Retailer 19
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£435 GBP
View
B
Retailer 20
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£460 GBP
View
B
Retailer 21
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£476 GBP
View
B
Retailer 22
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£483 GBP
View
B
Retailer 23
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£631 GBP
View
Most Expensive
B
Reve Diamonds
61D252AC6 · Nov 4
£761 GBP
$1,024 USD
View
23 more retailers have this diamond
Prices start from £109 GBPSave up to £652 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
1.05ct Round
£109 GBP