Marquise|Natural|GIA

1.50ct F SI1 Marquise Natural Diamond

EX • F/SI1

Diamond specifications and retailer prices

From £6,603 GBP
As of November 6, 2026
Save £5,732 GBP (46%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £12,335 GBP at NZ Jewellers · As of October 6, 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 F 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. Listed at 13 retailers as of November 5, 2026, with a 87% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
Dimensions11.63 × 5.82 × 3.88 mm
L/W Ratio2.00
Top View
11.63 mm5.82 mm1.50 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA
Side View
Table 62.0%CrownGirdle: ThickPavilionCulet: NoneDepth 66.7%

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 6
Current: £12,335 GBP|Low: £6,451 GBP|High: £12,335 GBP|Avg: £8,190 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 5, 2026
Retailer 8£6,451 GBP
Retailer 10£6,603 GBP
Retailer 4£7,257 GBP
Retailer 7£7,401 GBP
Retailer 5£7,866 GBP
Retailer 3£8,017 GBP
Retailer 9£8,221 GBP
Retailer 6£8,773 GBP
Retailer 2£9,251 GBP
NZ Jewellers£12,335 GBP

9 data points across 10 retailers

13 retailers£6,603 GBP to £12,335 GBP

Retailer 1
-
£6,451 GBP
Price last confirmed 31 days ago
B+
Retailer 2
-
£6,603 GBP
View
B+
Retailer 3
-
£7,257 GBP
View
Retailer 4
-
£7,401 GBP
View
Price last confirmed 26 days ago
B
Retailer 5
-
£7,866 GBP
View
Retailer 6
-
£8,017 GBP
View
Price last confirmed 31 days ago
B
Retailer 7
-
£8,017 GBP
View
B
Retailer 8
-
£8,221 GBP
View
B
Retailer 9
-
£8,773 GBP
View
Retailer 10
-
£9,251 GBP
View
Price last confirmed 29 days ago
B
Retailer 11
-
£9,251 GBP
View
B
Retailer 12
-
£12,335 GBP
View
Most Expensive
NZ Jewellers
f931565d-b274-4fea-ad34-fbd78b04fabd · Oct 6
£12,335 GBP
$16,510 USD
View
Price last confirmed 31 days ago
12 more retailers have this diamond
Prices start from £6,603 GBPSave up to £5,732 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
£6,603 GBP