Cushion|Lab Grown|GIA

1.50ct D SI1 Cushion Lab Grown Diamond

EX • D/SI1 • GIA 6412739498

Certificate GIA 6412739498

Diamond specifications and retailer prices

From £478 GBP
HK$5,000 HKD
As of October 31, 2026
Save £1,112 GBP (70%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,590 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.5ct lab-grown cushion diamond

This 1.5ct lab-grown cushion 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 6412739498. Listed at 11 retailers as of October 29, 2026, with prices from £478 to £1,590, a £1,112 spread on the same certified stone. MOH London lists it at £1,590. 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
OriginLab Grown
Grading LabGIA
CertificateGIA 6412739498
Dimensions6.98 × 6.48 × 4.38 mm
L/W Ratio1.08
Top View
6.98 mm6.48 mm1.50 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6412739498
Side View
Table 64.0%CrownGirdle: ThickPavilionCulet: NoneDepth 67.6%

Caratlytics Score

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

Price History

Last verified: Oct 31
Current: £1,590 GBP|Low: £431 GBP|High: £1,600 GBP|Avg: £768 GBP|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 7£431 GBP
Retailer 6£496 GBP
Retailer 8£582 GBP
Retailer 9£606 GBP
Retailer 3£651 GBP
Retailer 2£662 GBP
Retailer 5£847 GBP
Retailer 4£993 GBP
MOH London£1,590 GBP

42 data points across 9 retailers

11 retailers£478 GBP to £1,590 GBP

Retailer 1
-
£431 GBP
$577 USD
Price last confirmed 15 days ago
B+
Retailer 2
-
£478 GBP
HK$5,000 HKD
View
B+
Retailer 3
-
£495 GBP
$663 USD
View
B+
Retailer 4
-
£496 GBP
$665 USD
View
B+
Retailer 5
-
£582 GBP
$780 USD
View
B+
Retailer 6
-
£606 GBP
$812 USD
View
B+
Retailer 7
-
£651 GBP
View
B+
Retailer 8
-
£662 GBP
€845 EUR
View
Retailer 9
-
£847 GBP
$1,135 USD
View
Price last confirmed 10 days ago
B
Retailer 10
-
£993 GBP
$1,330 USD
View
Most Expensive
B
MOH London
6412739498 · Oct 29
£1,590 GBP
View
10 more retailers have this diamond
Prices start from £478 GBPSave up to £1,112 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 Cushion
£478 GBP