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Round|Lab Grown|IGI

1.51ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG749570981

Shape and cutting style on the report: Round brilliant

Certificate IGI LG749570981

Diamond specifications and retailer prices

From £174 GBP
As of November 5, 2026
Save £793 GBP (82%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £967 GBP at Reve Diamonds · As of November 4, 2026
View at Reve Diamonds

About this 1.51ct lab-grown round diamond

This 1.51ct lab-grown round sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG749570981 or 749570981. Listed at 21 retailers as of November 4, 2026, with prices from £174 to £967, a £793 spread on the same certified stone. Reve Diamonds lists it at £967. 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

1.51
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG749570981
Dimensions7.32 × 7.30 × 4.61 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
7.32 mm7.30 mm1.51 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG749570981
Side View
Table 57.0%Crown 34.4°Girdle: MED-STKPavilion 41.5°Culet: NoneDepth 63.1%

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: £401 GBP|Low: £172 GBP|High: £967 GBP|Avg: £471 GBP|+4.2%
Retailer 1
Retailer 2
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Retailer 5
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Retailer 11
Retailer 12
Retailer 13
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Retailer 17
Reve Diamonds
November 6, 2026
Retailer 8£174 GBP
Retailer 15£195 GBP
Retailer 16£201 GBP
Retailer 3£215 GBP
Retailer 4£215 GBP
Retailer 10£334 GBP
Retailer 17£335 GBP
Retailer 5£365 GBP
Retailer 1£401 GBP
Retailer 2£403 GBP
Retailer 14£404 GBP
Retailer 12£565 GBP
Retailer 9£692 GBP
Retailer 13£695 GBP
Retailer 7£731 GBP
Retailer 11£861 GBP
Retailer 6£906 GBP
Reve Diamonds£967 GBP

33 data points across 18 retailers

21 retailers£174 GBP to £967 GBP

A
Cheapest Retailer
-
£174 GBP
A
Retailer 2
-
£195 GBP
View
Final sale: no returns
A
Retailer 3
-
£201 GBP
View
Retailer 4
-
£215 GBP
View
Price last confirmed 12 days ago
A
Retailer 5
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£215 GBP
View
A
Retailer 6
-
£334 GBP
View
A
Retailer 7
-
£335 GBP
View
B+
Retailer 8
-
£365 GBP
View
B+
Retailer 9
-
£401 GBP
View
B+
Retailer 10
-
£403 GBP
View
B+
Retailer 11
-
£404 GBP
View
B
Retailer 12
-
£565 GBP
View
B+
Retailer 13
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£572 GBP
View
Retailer 14
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£590 GBP
View
Price last confirmed 68 days ago
Retailer 15
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£687 GBP
View
Price last confirmed 46 days ago
B
Retailer 16
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£692 GBP
View
B
Retailer 17
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£695 GBP
View
B
Retailer 18
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£731 GBP
View
B
Retailer 19
-
£861 GBP
View
B
Retailer 20
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£906 GBP
View
Most Expensive
B
Reve Diamonds
721BB40CF · Nov 4
£967 GBP
$1,302 USD
View
20 more retailers have this diamond
Prices start from £174 GBPSave up to £793 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
1.51ct Round
£174 GBP