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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 $7,635 AUD
HK$41,900 HKD
As of October 30, 2026
Save $8,781 AUD (53%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $16,416 AUD 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 $7,635 to $16,416, a $8,781 spread on the same certified stone. Queensmith lists it at $16,416. 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 30
Current: $16,416 AUD|Low: $7,635 AUD|High: $16,525 AUD|Avg: $10,671 AUD|+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 30, 2026
Retailer 10$7,635 AUD
Retailer 2$8,206 AUD
Retailer 4$9,066 AUD
Retailer 12$9,475 AUD
Retailer 9$9,477 AUD
Retailer 5$9,703 AUD
Retailer 6$9,845 AUD
Retailer 3$10,497 AUD
Retailer 11$10,664 AUD
Retailer 7$11,200 AUD
Retailer 8$14,328 AUD
Queensmith$16,416 AUD

25 data points across 12 retailers

15 retailers$7,635 AUD to $16,416 AUD

A
Cheapest Retailer
-
$7,635 AUD
HK$41,900 HKD
A
Retailer 2
-
$8,206 AUD
₹549,001 INR
View
Retailer 3
-
$8,835 AUD
SGD 8,387 SGD
View
Price last confirmed 15 days ago
A
Retailer 4
-
$9,066 AUD
SGD 8,606 SGD
View
B+
Retailer 5
-
$9,426 AUD
$6,621 USD
View
B+
Retailer 6
-
$9,475 AUD
$6,656 USD
View
Final sale: no returns
B+
Retailer 7
-
$9,477 AUD
$6,657 USD
View
A
Retailer 8
-
$9,703 AUD
£5,367 GBP
View
A
Retailer 9
-
$9,845 AUD
£5,445 GBP
View
B+
Retailer 10
-
$10,497 AUD
$7,374 USD
View
B+
Retailer 11
-
$10,612 AUD
View
B+
Retailer 12
-
$10,664 AUD
$7,491 USD
View
B+
Retailer 13
-
$11,200 AUD
€7,493 EUR
View
B+
Retailer 14
-
$14,328 AUD
£7,925 GBP
View
Most Expensive
B
Queensmith
2558551556 · Oct 28
$16,416 AUD
£9,080 GBP
View
14 more retailers have this diamond
Prices start from $7,635 AUDSave up to $8,781 AUD

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
$7,635 AUD