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Marquise|Natural|GIA

1.70ct F SI1 Marquise Natural Diamond

EX • F/SI1

Diamond specifications and retailer prices

From £9,024 GBP
$12,109 USD
As of October 27, 2026
Save £6,424 GBP (42%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £15,448 GBP at NZ Jewellers · As of October 6, 2026
View at NZ Jewellers

About this 1.7ct natural marquise diamond

This 1.7ct 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 4 retailers as of October 27, 2026, with a 71% 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

1.70
Carat
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
Dimensions11.66 × 5.99 × 3.87 mm
L/W Ratio1.95
Top View
11.66 mm5.99 mm1.70 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA
Side View
Table 59.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 64.6%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 27
Current: £15,448 GBP|Low: £9,024 GBP|High: £15,971 GBP|Avg: £12,160 GBP|-3.3%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
October 27, 2026
Retailer 3£9,024 GBP
Retailer 2£10,293 GBP
Retailer 4£12,469 GBP
NZ Jewellers£15,448 GBP

6 data points across 4 retailers

4 retailers£9,024 GBP to £15,448 GBP

B
Cheapest Retailer
-
£9,024 GBP
$12,109 USD
B
Retailer 2
-
£10,293 GBP
$13,812 USD
View
C
Retailer 3
-
£15,448 GBP
$20,730 USD
View
Most Expensive
NZ Jewellers
de9054bc-7d18-49d9-abd1-3fa5f1bcc9ad · Oct 6
£15,448 GBP
$20,730 USD
View
Price last confirmed 27 days ago
3 more retailers have this diamond
Prices start from £9,024 GBPSave up to £6,424 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
1.70ct Marquise
£9,024 GBP