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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 $5,551 AUD
As of November 6, 2026
Save $6,199 AUD (53%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $11,750 AUD 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 $5,551 to $11,750, a $6,199 spread on the same certified stone. MOH London lists it at $11,750. 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: $11,750 AUD|Low: $5,551 AUD|High: $12,022 AUD|Avg: $7,901 AUD|-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$5,551 AUD
Retailer 2$5,838 AUD
Retailer 7$6,647 AUD
Retailer 3$7,177 AUD
Retailer 5$7,284 AUD
Retailer 10$7,618 AUD
Retailer 8$7,804 AUD
Retailer 4$8,325 AUD
Retailer 6$9,025 AUD
MOH London$11,750 AUD

25 data points across 10 retailers

14 retailers$5,551 AUD to $11,750 AUD

A
Cheapest Retailer
-
$5,551 AUD
B+
Retailer 2
-
$5,838 AUD
View
B+
Retailer 3
-
$6,647 AUD
View
B+
Retailer 4
-
$6,874 AUD
View
B+
Retailer 5
-
$6,877 AUD
View
B+
Retailer 6
-
$7,177 AUD
View
B
Retailer 7
-
$7,235 AUD
View
B+
Retailer 8
-
$7,284 AUD
View
Retailer 9
-
$7,468 AUD
View
Price last confirmed 22 days ago
B
Retailer 10
-
$7,618 AUD
View
B+
Retailer 11
-
$7,804 AUD
View
B
Retailer 12
-
$8,325 AUD
View
B
Retailer 13
-
$9,025 AUD
View
Most Expensive
B
MOH London
CDD8FB650 · Nov 4
$11,750 AUD
£6,357 GBP
View
13 more retailers have this diamond
Prices start from $5,551 AUDSave up to $6,199 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
$5,551 AUD