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Marquise|Natural|GIA

1.70ct F SI1 Marquise Natural Diamond

EX • F/SI1 • GIA 5241023174

Certificate GIA 5241023174

Diamond specifications and retailer prices

From £8,746 GBP
CA$16,300 CAD
As of October 27, 2026
Save £2,502 GBP (22%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £15,448 GBP at NZ Jewellers · As of October 3, 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 5241023174. Listed at 10 retailers as of October 26, 2026, with a 29% 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
Crown angle39.91°
Pavilion angle38.78°
OriginNatural
Grading LabGIA
CertificateGIA 5241023174
Dimensions11.66 × 5.99 × 3.87 mm
L/W Ratio1.95
Culet sizeNone
Top View
11.66 mm5.99 mm1.70 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 5241023174
Side View
Table 59.0%Crown 39.91°Girdle: STK-VTKPavilion 38.78°Culet: NoneDepth 64.6%

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: Oct 27
Current: £9,928 GBP|Low: £6,036 GBP|High: £14,650 GBP|Avg: £10,097 GBP|+20.7%
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
October 28, 2026
Retailer 8£6,036 GBP
Retailer 5£7,451 GBP
Retailer 4£7,898 GBP
Retailer 2£8,392 GBP
Retailer 13£8,746 GBP
Retailer 10£8,909 GBP
Retailer 6£9,563 GBP
Retailer 1£9,928 GBP
Retailer 16£10,022 GBP
Retailer 11£10,097 GBP
Retailer 3£10,761 GBP
Retailer 18£10,761 GBP
Retailer 12£10,845 GBP
Retailer 17£11,118 GBP
Retailer 14£11,248 GBP
Retailer 9£12,152 GBP
Retailer 7£13,524 GBP
Retailer 15£14,650 GBP

15 data points across 18 retailers

10 retailers£8,746 GBP to £11,248 GBP

Retailer 1
-
£8,392 GBP
$11,261 USD
Price last confirmed 7 days ago
B+
Retailer 2
-
£8,746 GBP
CA$16,300 CAD
View
B+
Retailer 3
-
£9,928 GBP
View
Retailer 4
-
£10,022 GBP
$13,449 USD
View
Price last confirmed 21 days ago
B+
Retailer 5
-
£10,097 GBP
$13,550 USD
View
B
Retailer 6
-
£10,761 GBP
$14,440 USD
View
B
Retailer 7
-
£10,845 GBP
$14,553 USD
View
B
Retailer 8
-
£11,248 GBP
€14,375 EUR
View
Retailer 9
-
£14,650 GBP
View
Price last confirmed 22 days ago
Most Expensive
NZ Jewellers
7e516e3a-1d12-4631-bed3-9b2956fe97bc · Oct 3
£15,448 GBP
$20,730 USD
View
Price last confirmed 30 days ago
9 more retailers have this diamond
Prices start from £8,746 GBPSave up to £2,502 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
£8,746 GBP