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Cushion|Natural|GIA

1.70ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 1545692555

Certificate GIA 1545692555

Diamond specifications and retailer prices

From £2,515 GBP
As of November 6, 2026
Save £2,770 GBP (52%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £5,285 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 1545692555. Listed at 14 retailers as of November 4, 2026, with prices from £2,515 to £5,285, a £2,770 spread on the same certified stone. MOH London lists it at £5,285. 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
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 1545692555
Dimensions8.17 × 6.09 × 4.13 mm
L/W Ratio1.34
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Indented Natural
Top View
8.17 mm6.09 mm1.70 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1545692555
Side View
Table 63.0%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: £5,285 GBP|Low: £2,515 GBP|High: £5,812 GBP|Avg: £3,643 GBP|-9.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 3£2,515 GBP
Retailer 2£2,663 GBP
Retailer 11£2,976 GBP
Retailer 10£3,175 GBP
Retailer 6£3,201 GBP
Retailer 9£3,219 GBP
Retailer 7£3,350 GBP
Retailer 12£3,422 GBP
Retailer 4£3,597 GBP
Retailer 5£3,744 GBP
Retailer 8£4,060 GBP
MOH London£5,285 GBP

29 data points across 12 retailers

14 retailers£2,515 GBP to £5,285 GBP

A
Cheapest Retailer
-
£2,515 GBP
A
Retailer 2
-
£2,663 GBP
View
B+
Retailer 3
-
£2,976 GBP
View
B+
Retailer 4
-
£3,175 GBP
View
B+
Retailer 5
-
£3,201 GBP
View
B+
Retailer 6
-
£3,219 GBP
View
B+
Retailer 7
-
£3,328 GBP
View
B+
Retailer 8
-
£3,350 GBP
View
B+
Retailer 9
-
£3,422 GBP
View
B+
Retailer 10
-
£3,534 GBP
View
Retailer 11
-
£3,597 GBP
View
Price last confirmed 22 days ago
B
Retailer 12
-
£3,744 GBP
View
B+
Retailer 13
-
£4,060 GBP
View
Most Expensive
B
MOH London
43B26F09F · Nov 4
£5,285 GBP
View
13 more retailers have this diamond
Prices start from £2,515 GBPSave up to £2,770 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
£2,515 GBP