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Marquise|Natural|GIA

1.70ct F SI1 Marquise Natural Diamond

GD • F/SI1 • GIA 6542671205

Certificate GIA 6542671205

Diamond specifications and retailer prices

From £11,542 GBP
A$23,828 AUD
As of November 2, 2026
Save £234 GBP (2%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £11,776 GBP at Yorxs · As of October 28, 2026
View at Yorxs

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 standard cut grade stated by the retailer rather than the lab and certified by GIA 6542671205. Listed at 3 retailers as of October 28, 2026, with a relatively tight 2% 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

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

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.94°
Pavilion angle39.56°
OriginNatural
Grading LabGIA
CertificateGIA 6542671205
Dimensions10.99 × 6.04 × 4.02 mm
L/W Ratio1.82
Top View
10.99 mm6.04 mm1.70 ctF / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6542671205
Side View
Table 60.0%Crown 43.94°Girdle: STK-VTKPavilion 39.56°Culet: NoneDepth 66.6%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 2
Current: £9,585 GBP|Low: £6,220 GBP|High: £13,985 GBP|Avg: £9,709 GBP
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
Yorxs
October 28, 2026
Retailer 3£6,220 GBP
Retailer 4£7,935 GBP
Retailer 12£8,326 GBP
Retailer 7£8,871 GBP
Retailer 10£9,030 GBP
Retailer 13£9,105 GBP
Retailer 2£9,188 GBP
Retailer 1£9,585 GBP
Retailer 11£9,605 GBP
Retailer 5£10,188 GBP
Retailer 8£10,623 GBP
Retailer 6£11,542 GBP
Yorxs£11,776 GBP
Retailer 9£13,985 GBP

3 data points across 14 retailers

3 retailers£11,542 GBP to £11,776 GBP

Retailer 1
-
£9,585 GBP
$12,863 USD
Price last confirmed 13 days ago
B
Retailer 2
-
£11,542 GBP
A$23,828 AUD
View
Most Expensive
C
Yorxs
54F43B549 · Oct 28
£11,776 GBP
€15,050 EUR
View
2 more retailers have this diamond
Prices start from £11,542 GBPSave up to £234 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
£11,542 GBP