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Cushion|Natural|GIA

1.05ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 6511232942

Certificate GIA 6511232942

Diamond specifications and retailer prices

From $3,371 AUD
As of November 1, 2026
Save $1,881 AUD (36%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $5,252 AUD at 77 Diamonds · As of November 2, 2026
View at 77 Diamonds

About this 1.05ct natural cushion diamond

This 1.05ct natural cushion sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6511232942. Listed at 6 retailers as of November 1, 2026, with prices from $3,371 to $5,252, a $1,881 spread on the same certified stone. 77 Diamonds lists it at $5,252. 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

1.05
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.84°
OriginNatural
Grading LabGIA
CertificateGIA 6511232942
Dimensions7.08 × 5.45 × 3.69 mm
L/W Ratio1.30
Top View
7.08 mm5.45 mm1.05 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6511232942
Side View
Table 61.0%Crown 33.84°Girdle: MED-THKPavilionCulet: NoneDepth 67.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $5,252 AUD|Low: $3,215 AUD|High: $5,264 AUD|Avg: $4,040 AUD|+2.0%
77 Diamonds
Retailer 2
Retailer 3
November 2, 2026
Retailer 3$3,445 AUD
Retailer 2$3,536 AUD
77 Diamonds$5,252 AUD

37 data points across 3 retailers

6 retailers$3,371 AUD to $5,252 AUD

B+
Cheapest Retailer
-
$3,371 AUD
B
Retailer 2
-
$3,418 AUD
$2,396 USD
View
B
Retailer 3
-
$3,445 AUD
$2,414 USD
View
B
Retailer 4
-
$3,536 AUD
$2,478 USD
View
Final sale: no returns
B
Retailer 5
-
$3,653 AUD
$2,560 USD
View
Most Expensive
B
77 Diamonds
CUSDHY3SAUEMT · Nov 2
$5,252 AUD
£2,898 GBP
View
5 more retailers have this diamond
Prices start from $3,371 AUDSave up to $1,881 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.

B+
1.05ct Cushion
$3,371 AUD