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Round|Lab Grown|IGI

1.24ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG670465505

Shape and cutting style on the report: Round brilliant

Certificate IGI LG670465505

Diamond specifications and retailer prices

From £147 GBP
As of November 5, 2026
Save £735 GBP (83%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £883 GBP at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

About this 1.24ct lab-grown round diamond

This 1.24ct 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 LG670465505 or 670465505. Listed at 22 retailers as of November 5, 2026, with prices from £147 to £883, a £735 spread on the same certified stone. Reve Diamonds lists it at £883. 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

1.24
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG670465505
Dimensions6.89 × 6.87 × 4.28 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
6.89 mm6.87 mm1.24 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG670465505
Side View
Table 58.0%Crown 35.2°Girdle: MediumPavilion 41.1°Culet: NoneDepth 62.2%

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: £358 GBP|Low: £146 GBP|High: £883 GBP|Avg: £392 GBP|-1.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
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Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Reve Diamonds
November 6, 2026
Retailer 7£147 GBP
Retailer 5£164 GBP
Retailer 16£171 GBP
Retailer 2£183 GBP
Retailer 3£183 GBP
Retailer 4£318 GBP
Retailer 11£330 GBP
Retailer 10£346 GBP
Retailer 1£358 GBP
Retailer 9£364 GBP
Retailer 17£366 GBP
Retailer 15£390 GBP
Retailer 12£490 GBP
Retailer 8£587 GBP
Retailer 14£589 GBP
Retailer 6£626 GBP
Retailer 13£851 GBP
Reve Diamonds£883 GBP

35 data points across 18 retailers

22 retailers£147 GBP to £883 GBP

A
Cheapest Retailer
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£147 GBP
A
Retailer 2
-
£164 GBP
View
Final sale: no returns
A
Retailer 3
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£171 GBP
View
A
Retailer 4
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£183 GBP
View
Retailer 5
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£183 GBP
View
Price last confirmed 12 days ago
B+
Retailer 6
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£299 GBP
View
B+
Retailer 7
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£318 GBP
View
B+
Retailer 8
-
£330 GBP
View
B+
Retailer 9
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£346 GBP
View
B+
Retailer 10
-
£358 GBP
View
B+
Retailer 11
-
£364 GBP
View
B+
Retailer 12
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£366 GBP
View
B+
Retailer 13
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£390 GBP
View
B+
Retailer 14
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£483 GBP
View
B
Retailer 15
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£490 GBP
View
B
Retailer 16
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£499 GBP
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Retailer 17
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£582 GBP
View
Price last confirmed 46 days ago
B
Retailer 18
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£587 GBP
View
B
Retailer 19
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£589 GBP
View
B
Retailer 20
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£626 GBP
View
B
Retailer 21
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£851 GBP
View
Most Expensive
B
Reve Diamonds
5520D022F · Nov 6
£883 GBP
$1,188 USD
View
21 more retailers have this diamond
Prices start from £147 GBPSave up to £735 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
1.24ct Round
£147 GBP