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Marquise|Natural|GIA

1.50ct K SI1 Marquise Natural Diamond

VG • K/SI1 • GIA 5242018791

Certificate GIA 5242018791

Diamond specifications and retailer prices

From £2,878 GBP
As of November 6, 2026
Save £3,488 GBP (55%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £7,066 GBP at NZ Jewellers · As of September 21, 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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 5242018791. Listed at 16 retailers as of November 4, 2026, with a 121% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5242018791
Dimensions10.90 × 5.88 × 3.87 mm
L/W Ratio1.85
Girdle conditionFaceted
Top View
10.90 mm5.88 mm1.50 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5242018791
Side View
Table 63.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 65.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £3,888 GBP|Low: £2,859 GBP|High: £6,497 GBP|Avg: £4,017 GBP|-3.7%
Retailer 1
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
November 6, 2026
Retailer 13£2,878 GBP
Retailer 3£2,916 GBP
Retailer 11£3,049 GBP
Retailer 4£3,172 GBP
Retailer 2£3,352 GBP
Retailer 6£3,422 GBP
Retailer 14£3,442 GBP
Retailer 12£3,459 GBP
Retailer 8£3,594 GBP
Retailer 1£3,888 GBP
Retailer 7£4,286 GBP
Retailer 9£4,890 GBP
Retailer 5£5,841 GBP
Retailer 10£6,366 GBP

24 data points across 14 retailers

16 retailers£2,878 GBP to £6,366 GBP

A
Cheapest Retailer
-
£2,878 GBP
A
Retailer 2
-
£2,916 GBP
View
A
Retailer 3
-
£3,049 GBP
View
A
Retailer 4
-
£3,172 GBP
View
A
Retailer 5
-
£3,352 GBP
View
Final sale: no returns
A
Retailer 6
-
£3,422 GBP
View
A
Retailer 7
-
£3,442 GBP
View
B+
Retailer 8
-
£3,459 GBP
View
B+
Retailer 9
-
£3,594 GBP
View
B+
Retailer 10
-
£3,825 GBP
View
B+
Retailer 11
-
£3,888 GBP
View
B+
Retailer 12
-
£4,286 GBP
View
B
Retailer 13
-
£4,890 GBP
View
B
Retailer 14
-
£5,841 GBP
View
B
Retailer 15
-
£6,366 GBP
View
Most Expensive
NZ Jewellers
ef6fab67-c475-4b9d-8407-d5be0307f5ab · Sep 21
£7,066 GBP
$9,458 USD
View
Price last confirmed 46 days ago
15 more retailers have this diamond
Prices start from £2,878 GBPSave up to £3,488 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
1.50ct Marquise
£2,878 GBP