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Heart|Lab Grown|GIA

1.50ct D SI1 Heart Lab Grown Diamond

EX • D/SI1 • GIA 1428186208

Certificate GIA 1428186208

Diamond specifications and retailer prices

From £332 GBP
As of November 6, 2026
Save £657 GBP (66%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £990 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.5ct lab-grown heart diamond

This 1.5ct 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 stated by the retailer rather than the lab and certified by GIA 1428186208. Listed at 9 retailers as of November 1, 2026, with prices from £332 to £990, a £657 spread on the same certified stone. MOH London lists it at £990. 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

1.50
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.11°
Pavilion angle49.3°
OriginLab Grown
Grading LabGIA
CertificateGIA 1428186208
Dimensions6.66 × 6.26 × 4.17 mm
L/W Ratio1.06
Star length45%
Cert comments
Additional growth remnants are not shown. This is a man-made diamond produced by HPHT (High Pressure High Temperature) growth process. No evidence of treatment was detected.
Key to symbols
Growth Remnant
Top View
6.66 mm6.26 mm1.50 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1428186208
Side View
Table 62.0%Crown 32.11°Girdle: STK-VTKPavilion 49.3°Culet: NoneDepth 66.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £990 GBP|Low: £247 GBP|High: £1,043 GBP|Avg: £497 GBP|-4.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 9£247 GBP
Retailer 8£332 GBP
Retailer 5£366 GBP
Retailer 2£388 GBP
Retailer 3£421 GBP
Retailer 7£436 GBP
Retailer 6£498 GBP
Retailer 4£634 GBP
MOH London£990 GBP

44 data points across 9 retailers

9 retailers£332 GBP to £990 GBP

Retailer 1
-
£247 GBP
Price last confirmed 12 days ago
B+
Retailer 2
-
£332 GBP
View
B+
Retailer 3
-
£366 GBP
View
B+
Retailer 4
-
£388 GBP
View
B+
Retailer 5
-
£421 GBP
View
B+
Retailer 6
-
£436 GBP
View
B+
Retailer 7
-
£498 GBP
View
B
Retailer 8
-
£634 GBP
View
Most Expensive
B
MOH London
1428186208 · Nov 1
£990 GBP
View
8 more retailers have this diamond
Prices start from £332 GBPSave up to £657 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.

B+
1.50ct Heart
£332 GBP