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Radiant|Lab Grown|IGI

1.30ct D SI1 Radiant Lab Grown Diamond

ID • D/SI1 • IGI LG648436048

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG648436048

Diamond specifications and retailer prices

From £115 GBP
$154 USD
As of October 30, 2026
Save £665 GBP (85%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £780 GBP at Reve Diamonds · As of October 30, 2026
View at Reve Diamonds

About this 1.3ct lab-grown radiant diamond

This 1.3ct lab-grown radiant sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG648436048 or 648436048. Listed at 16 retailers as of October 30, 2026, with prices from £115 to £780, a £665 spread on the same certified stone. Reve Diamonds lists it at £780. 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

1.30
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.6°
Pavilion angle30°
OriginLab Grown
Grading LabIGI
CertificateIGI LG648436048
Dimensions7.39 × 5.34 × 3.60 mm
L/W Ratio1.38
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.39 mm5.34 mm1.30 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG648436048
Side View
Table 60.0%Crown 40.6°Girdle: MED-STKPavilion 30°Culet: NoneDepth 67.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: £246 GBP|Low: £115 GBP|High: £780 GBP|Avg: £361 GBP|+3.7%
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
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Retailer 16
Reve Diamonds
November 1, 2026
Retailer 5£115 GBP
Retailer 3£128 GBP
Retailer 11£143 GBP
Retailer 16£143 GBP
Retailer 4£171 GBP
Retailer 10£193 GBP
Retailer 1£246 GBP
Retailer 9£277 GBP
Retailer 2£332 GBP
Retailer 15£366 GBP
Retailer 8£406 GBP
Retailer 6£457 GBP
Retailer 13£483 GBP
Retailer 7£498 GBP
Retailer 14£619 GBP
Retailer 12£668 GBP
Reve Diamonds£780 GBP

17 data points across 17 retailers

16 retailers£115 GBP to £780 GBP

A
Cheapest Retailer
-
£115 GBP
$154 USD
A
Retailer 2
-
£128 GBP
$171 USD
View
Final sale: no returns
A
Retailer 3
-
£143 GBP
$191 USD
View
A
Retailer 4
-
£143 GBP
$191 USD
View
Retailer 5
-
£171 GBP
View
Price last confirmed 16 days ago
B+
Retailer 6
-
£193 GBP
$258 USD
View
A
Retailer 7
-
£246 GBP
View
A
Retailer 8
-
£277 GBP
View
B+
Retailer 9
-
£332 GBP
$445 USD
View
B+
Retailer 10
-
£366 GBP
$490 USD
View
B+
Retailer 11
-
£457 GBP
$612 USD
View
B+
Retailer 12
-
£483 GBP
$647 USD
View
B
Retailer 13
-
£498 GBP
$668 USD
View
Retailer 14
-
£619 GBP
$830 USD
View
Price last confirmed 11 days ago
B
Retailer 15
-
£668 GBP
View
Most Expensive
B
Reve Diamonds
F3D683A23 · Oct 30
£780 GBP
$1,046 USD
View
15 more retailers have this diamond
Prices start from £115 GBPSave up to £665 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
1.30ct Radiant
£115 GBP