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Cushion|Natural|GIA

0.90ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 6285677170

Certificate GIA 6285677170

Diamond specifications and retailer prices

From $784 AUD
As of November 6, 2026
Save $2,687 AUD (77%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $3,471 AUD at Adiamor · As of November 5, 2026
View at Adiamor

About this 0.9ct natural cushion diamond

This 0.9ct natural cushion sits in the just-under-one-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 6285677170. Listed at 16 retailers as of November 5, 2026, with prices from $784 to $3,471, a $2,687 spread on the same certified stone. Adiamor lists it at $3,471. 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

0.90
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6285677170
Dimensions5.26 × 5.21 × 3.84 mm
L/W Ratio1.01
Top View
5.26 mm5.21 mm0.90 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6285677170
Side View
Table 54.0%CrownGirdle: THK-THKPavilionCulet: NoneDepth 73.7%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: $1,370 AUD|Low: $784 AUD|High: $2,253 AUD|Avg: $1,458 AUD|+2.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 7, 2026
Retailer 8$784 AUD
Retailer 2$838 AUD
Retailer 7$1,142 AUD
Retailer 4$1,151 AUD
Retailer 11$1,156 AUD
Retailer 14$1,167 AUD
Retailer 6$1,249 AUD
Retailer 15$1,292 AUD
Retailer 5$1,301 AUD
Retailer 1$1,370 AUD
Retailer 3$1,397 AUD
Retailer 10$1,617 AUD
Retailer 12$1,685 AUD
Retailer 13$2,105 AUD
Retailer 9$2,202 AUD

26 data points across 15 retailers

16 retailers$784 AUD to $3,471 AUD

A
Cheapest Retailer
-
$784 AUD
A
Retailer 2
-
$838 AUD
View
B+
Retailer 3
-
$1,142 AUD
View
Retailer 4
-
$1,151 AUD
View
Price last confirmed 9 days ago
B+
Retailer 5
-
$1,156 AUD
View
B+
Retailer 6
-
$1,167 AUD
View
B+
Retailer 7
-
$1,249 AUD
View
B+
Retailer 8
-
$1,292 AUD
View
B+
Retailer 9
-
$1,301 AUD
View
B+
Retailer 10
-
$1,370 AUD
View
B+
Retailer 11
-
$1,397 AUD
View
B+
Retailer 12
-
$1,617 AUD
View
B+
Retailer 13
-
$1,685 AUD
View
B
Retailer 14
-
$2,105 AUD
View
B
Retailer 15
-
$2,202 AUD
View
Most Expensive
B
Adiamor
D-51268865 · Nov 5
$3,471 AUD
$2,385 USD
View
15 more retailers have this diamond
Prices start from $784 AUDSave up to $2,687 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
0.90ct Cushion
$784 AUD