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Marquise|Natural|GIA

1.50ct K SI1 Marquise Natural Diamond

GD • K/SI1 • GIA 6421532753

Certificate GIA 6421532753

Diamond specifications and retailer prices

From £4,229 GBP
As of November 1, 2026
Save £5,198 GBP (55%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £9,426 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.5ct natural marquise diamond

This 1.5ct natural marquise sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6421532753. Listed at 16 retailers as of November 1, 2026, with prices from £4,229 to £9,426, a £5,198 spread on the same certified stone. NZ Jewellers lists it at £9,426. 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
K
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6421532753
Dimensions10.58 × 6.12 × 3.70 mm
L/W Ratio1.73
Top View
10.58 mm6.12 mm1.50 ctK / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6421532753
Side View
Table 57.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 60.5%

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: Nov 1
Current: £5,465 GBP|Low: £4,229 GBP|High: £7,949 GBP|Avg: £5,619 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 6£4,229 GBP
Retailer 8£4,713 GBP
Retailer 9£4,733 GBP
Retailer 7£5,184 GBP
Retailer 3£5,261 GBP
Retailer 1£5,465 GBP
Retailer 2£5,792 GBP
Retailer 4£6,876 GBP
Retailer 5£7,833 GBP

43 data points across 9 retailers

16 retailers£4,229 GBP to £9,426 GBP

B+
Cheapest Retailer
-
£4,229 GBP
B
Retailer 2
-
£4,403 GBP
View
B
Retailer 3
-
£4,453 GBP
View
Retailer 4
-
£4,713 GBP
View
Price last confirmed 9 days ago
B
Retailer 5
-
£4,733 GBP
View
B
Retailer 6
-
£4,752 GBP
View
B
Retailer 7
-
£5,106 GBP
View
B
Retailer 8
-
£5,184 GBP
View
B
Retailer 9
-
£5,261 GBP
View
B
Retailer 10
-
£5,387 GBP
View
B
Retailer 11
-
£5,465 GBP
View
B
Retailer 12
-
£5,792 GBP
View
B
Retailer 13
-
£5,891 GBP
View
C
Retailer 14
-
£6,876 GBP
View
C
Retailer 15
-
£7,833 GBP
View
Most Expensive
C
NZ Jewellers
410d9d39-bdb2-4718-88e0-f9d91a295208 · Nov 5
£9,426 GBP
$12,617 USD
View
15 more retailers have this diamond
Prices start from £4,229 GBPSave up to £5,198 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 Marquise
£4,229 GBP