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Marquise|Natural|GIA

1.70ct F SI1 Marquise Natural Diamond

EX • F/SI1 • GIA 2557726060

Certificate GIA 2557726060

Diamond specifications and retailer prices

From £10,345 GBP
CA$19,281 CAD
As of November 2, 2026
Save £2,192 GBP (17%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £12,537 GBP at 77 Diamonds · As of November 2, 2026
View at 77 Diamonds

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 2557726060. Listed at 2 retailers as of November 2, 2026, with prices from £10,345 to £12,537, a £2,192 spread on the same certified stone. 77 Diamonds lists it at £12,537. 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
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557726060
Dimensions11.39 × 6.19 × 3.94 mm
L/W Ratio1.84
Top View
11.39 mm6.19 mm1.70 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2557726060
Side View
Table 60.0%CrownGirdlePavilionCuletDepth 63.6%

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: £12,537 GBP|Low: £10,345 GBP|High: £12,662 GBP|Avg: £11,451 GBP|+1.4%
77 Diamonds
Retailer 2
November 2, 2026
Retailer 2£10,345 GBP
77 Diamonds£12,537 GBP

36 data points across 2 retailers

2 retailers£10,345 GBP to £12,537 GBP

B
Cheapest Retailer
-
£10,345 GBP
CA$19,281 CAD
Most Expensive
B
77 Diamonds
MQMBGCH7VQZP · Nov 2
£12,537 GBP
View
1 more retailer has this diamond
Prices start from £10,345 GBPSave up to £2,192 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
£10,345 GBP