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Cushion|Natural|GIA

1.70ct E SI2 Cushion Natural Diamond

EX • E/SI2 • GIA 2558551556

Certificate GIA 2558551556

Diamond specifications and retailer prices

From £4,027 GBP
HK$41,900 HKD
As of October 29, 2026
Save £4,632 GBP (53%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £8,659 GBP at Queensmith · As of October 28, 2026
View at Queensmith

About this 1.7ct natural cushion diamond

This 1.7ct natural cushion sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2558551556. Listed at 15 retailers as of October 28, 2026, with prices from £4,027 to £8,659, a £4,632 spread on the same certified stone. Queensmith lists it at £8,659. 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
E
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2558551556
Dimensions7.88 × 6.07 × 4.22 mm
L/W Ratio1.30
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cavity, Feather, Cloud, Needle
Top View
7.88 mm6.07 mm1.70 ctE / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2558551556
Side View
Table 64.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 69.4%

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: Oct 29
Current: £8,659 GBP|Low: £4,027 GBP|High: £8,717 GBP|Avg: £5,625 GBP|+2.1%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 29, 2026
Retailer 10£4,027 GBP
Retailer 5£4,332 GBP
Retailer 4£4,782 GBP
Retailer 12£4,998 GBP
Retailer 9£4,999 GBP
Retailer 6£5,133 GBP
Retailer 2£5,177 GBP
Retailer 3£5,537 GBP
Retailer 11£5,625 GBP
Retailer 7£5,908 GBP
Retailer 8£7,558 GBP
Queensmith£8,659 GBP

24 data points across 12 retailers

15 retailers£4,027 GBP to £8,659 GBP

A
Cheapest Retailer
-
£4,027 GBP
HK$41,900 HKD
A
Retailer 2
-
£4,332 GBP
₹549,418 INR
View
Retailer 3
-
£4,661 GBP
SGD 8,387 SGD
View
Price last confirmed 14 days ago
A
Retailer 4
-
£4,782 GBP
SGD 8,606 SGD
View
B+
Retailer 5
-
£4,972 GBP
$6,621 USD
View
B+
Retailer 6
-
£4,998 GBP
$6,656 USD
View
Final sale: no returns
B+
Retailer 7
-
£4,999 GBP
$6,657 USD
View
A
Retailer 8
-
£5,133 GBP
View
A
Retailer 9
-
£5,177 GBP
View
B+
Retailer 10
-
£5,537 GBP
$7,374 USD
View
B+
Retailer 11
-
£5,598 GBP
A$11,468 AUD
View
B+
Retailer 12
-
£5,625 GBP
$7,491 USD
View
B+
Retailer 13
-
£5,908 GBP
€7,493 EUR
View
B+
Retailer 14
-
£7,558 GBP
View
Most Expensive
B
Queensmith
2558551556 · Oct 28
£8,659 GBP
View
14 more retailers have this diamond
Prices start from £4,027 GBPSave up to £4,632 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
£4,027 GBP