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Marquise|Natural|GIA

1.70ct K SI2 Marquise Natural Diamond

ID • K/SI2 • GIA 2548049397

Certificate GIA 2548049397

Diamond specifications and retailer prices

From £5,542 GBP
$7,418 USD
As of November 5, 2026
3 retailers carry this diamond
Most expensive: £5,542 GBP at Blue Nile
View at Blue Nile

About this 1.7ct natural marquise diamond

This 1.7ct natural marquise sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2548049397. Listed at 3 retailers as of November 5, 2026. 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
K
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle40.6°
Pavilion angle37.5°
OriginNatural
Grading LabGIA
CertificateGIA 2548049397
Dimensions11.75 × 6.13 × 3.71 mm
L/W Ratio1.92
Culet sizeNone
Top View
11.75 mm6.13 mm1.70 ctK / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2548049397
Side View
Table 60.0%Crown 40.6°Girdle: THN-VTKPavilion 37.5°Culet: NoneDepth 60.5%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 5
Current: £5,542 GBP|Low: £2,823 GBP|High: £7,051 GBP|Avg: £5,054 GBP
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
September 30, 2026
Retailer 10£2,823 GBP
Retailer 9£4,132 GBP
Retailer 11£4,177 GBP
Retailer 8£4,422 GBP
Retailer 4£4,504 GBP
Retailer 2£4,853 GBP
Retailer 7£5,112 GBP
Blue Nile£5,542 GBP
Retailer 5£6,329 GBP
Retailer 3£6,442 GBP
Retailer 6£7,051 GBP

4 data points across 11 retailers

3 retailers

Retailer 1
-
£4,504 GBP
Price last confirmed 14 days ago
Retailer 2
-
£4,853 GBP
View
Price last confirmed 16 days ago
Most Expensive
B
Blue Nile
28925226 · Nov 5
£5,542 GBP
$7,418 USD
View
2 more retailers have this diamond

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
£5,542 GBP