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Heart|Lab Grown|IGI

1.51ct D SI1 Heart Lab Grown Diamond

ID • D/SI1 • IGI LG700570324

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG700570324

Diamond specifications and retailer prices

From £152 GBP
As of November 6, 2026
Save £774 GBP (84%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £926 GBP at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

About this 1.51ct lab-grown heart diamond

This 1.51ct lab-grown heart 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 LG700570324 or 700570324. Listed at 15 retailers as of November 6, 2026, with prices from £152 to £926, a £774 spread on the same certified stone. Brilliant Earth lists it at £926. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.8°
Pavilion angle41.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG700570324
Dimensions7.24 × 7.66 × 4.65 mm
L/W Ratio1.06
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.24 mm7.66 mm1.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG700570324
Side View
Table 58.0%Crown 36.8°Girdle: MED-STKPavilion 41.9°Culet: NoneDepth 60.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £926 GBP|Low: £152 GBP|High: £926 GBP|Avg: £399 GBP
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
Retailer 15
November 6, 2026
Retailer 14£152 GBP
Retailer 11£176 GBP
Retailer 7£178 GBP
Retailer 4£188 GBP
Retailer 6£197 GBP
Retailer 15£254 GBP
Retailer 2£318 GBP
Retailer 8£343 GBP
Retailer 3£369 GBP
Retailer 12£421 GBP
Retailer 13£436 GBP
Retailer 10£493 GBP
Retailer 5£606 GBP
Retailer 9£879 GBP
Brilliant Earth£926 GBP

46 data points across 15 retailers

15 retailers£152 GBP to £926 GBP

A
Cheapest Retailer
-
£152 GBP
A
Retailer 2
-
£176 GBP
View
A
Retailer 3
-
£178 GBP
View
Final sale: no returns
A
Retailer 4
-
£188 GBP
View
Retailer 5
-
£197 GBP
View
Price last confirmed 12 days ago
B+
Retailer 6
-
£254 GBP
View
A
Retailer 7
-
£318 GBP
View
A
Retailer 8
-
£343 GBP
View
B+
Retailer 9
-
£369 GBP
View
B+
Retailer 10
-
£421 GBP
View
B+
Retailer 11
-
£436 GBP
View
B+
Retailer 12
-
£493 GBP
View
B
Retailer 13
-
£606 GBP
View
B
Retailer 14
-
£879 GBP
View
Most Expensive
B
Brilliant Earth
13883714A · Nov 6
£926 GBP
$1,240 USD
View
14 more retailers have this diamond
Prices start from £152 GBPSave up to £774 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 Heart
£152 GBP