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Cushion|Natural|GIA

1.70ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 2557529237

Certificate GIA 2557529237

Diamond specifications and retailer prices

From £2,849 GBP
As of November 6, 2026
Save £3,182 GBP (53%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £6,032 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.7ct natural cushion diamond

This 1.7ct natural cushion sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557529237. Listed at 14 retailers as of November 4, 2026, with prices from £2,849 to £6,032, a £3,182 spread on the same certified stone. MOH London lists it at £6,032. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557529237
Dimensions8.19 × 6.11 × 4.14 mm
L/W Ratio1.34
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Pinpoint
Top View
8.19 mm6.11 mm1.70 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557529237
Side View
Table 66.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 67.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £6,032 GBP|Low: £2,849 GBP|High: £6,171 GBP|Avg: £4,056 GBP|-2.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 9£2,849 GBP
Retailer 2£2,997 GBP
Retailer 7£3,412 GBP
Retailer 3£3,684 GBP
Retailer 5£3,739 GBP
Retailer 10£3,910 GBP
Retailer 8£4,006 GBP
Retailer 4£4,273 GBP
Retailer 6£4,633 GBP
MOH London£6,032 GBP

25 data points across 10 retailers

14 retailers£2,849 GBP to £6,032 GBP

A
Cheapest Retailer
-
£2,849 GBP
B+
Retailer 2
-
£2,997 GBP
View
B+
Retailer 3
-
£3,412 GBP
View
B+
Retailer 4
-
£3,529 GBP
View
B+
Retailer 5
-
£3,530 GBP
View
B+
Retailer 6
-
£3,684 GBP
View
B
Retailer 7
-
£3,714 GBP
View
B+
Retailer 8
-
£3,739 GBP
View
Retailer 9
-
£3,833 GBP
View
Price last confirmed 22 days ago
B
Retailer 10
-
£3,910 GBP
View
B+
Retailer 11
-
£4,006 GBP
View
B
Retailer 12
-
£4,273 GBP
View
B
Retailer 13
-
£4,633 GBP
View
Most Expensive
B
MOH London
CDD8FB650 · Nov 4
£6,032 GBP
View
13 more retailers have this diamond
Prices start from £2,849 GBPSave up to £3,182 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.

A
1.70ct Cushion
£2,849 GBP