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Cushion|Lab Grown|GIA

1.50ct H SI1 Cushion Lab Grown Diamond

GD • H/SI1 • GIA 6155562855

Certificate GIA 6155562855

Diamond specifications and retailer prices

From £3,762 GBP
$5,040 USD
As of October 30, 2026
Save £127 GBP (3%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £3,888 GBP at Jared · As of October 30, 2026
View at Jared

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 H colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6155562855. Listed at 3 retailers as of October 30, 2026, with a relatively tight 3% spread, which is unusual at this carat range and suggests competitive pricing across the listings. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.50
Carat
H
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginLab Grown
Grading LabGIA
CertificateGIA 6155562855
Dimensions6.33 × 6.02 mm
L/W Ratio1.05
Top View
6.33 mm6.02 mm1.50 ctH / SI1
OriginLab Grown
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6155562855
Side View
Table 65.0%CrownGirdle: MED-ETKPavilionCulet: NoneDepth 69.7%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £3,888 GBP|Low: £3,762 GBP|High: £4,426 GBP|Avg: £4,119 GBP|-12.1%
Jared
Retailer 2
Retailer 3
June 18, 2026
Retailer 2£3,762 GBP
Retailer 3£3,762 GBP
Jared£3,888 GBP

6 data points across 3 retailers

3 retailers£3,762 GBP to £3,888 GBP

B
Cheapest Retailer
-
£3,762 GBP
$5,040 USD
B
Retailer 2
-
£3,762 GBP
$5,040 USD
View
Most Expensive
C
Jared
146739188 · Oct 30
£3,888 GBP
$5,210 USD
View
2 more retailers have this diamond
Prices start from £3,762 GBPSave up to £127 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
£3,762 GBP