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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 $4,201 NZD
A$3,635 AUD
As of November 3, 2026
Save $2,344 NZD (36%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $6,544 NZD at 77 Diamonds · As of November 3, 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 3, 2026, with prices from $4,201 to $6,544, a $2,344 spread on the same certified stone. 77 Diamonds lists it at $6,544. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 3
Current: $6,544 NZD|Low: $4,006 NZD|High: $6,559 NZD|Avg: $5,039 NZD|+2.1%
77 Diamonds
Retailer 2
Retailer 3
November 3, 2026
Retailer 3$4,292 NZD
Retailer 2$4,406 NZD
77 Diamonds$6,544 NZD

37 data points across 3 retailers

6 retailers$4,201 NZD to $6,544 NZD

B+
Cheapest Retailer
-
$4,201 NZD
A$3,635 AUD
B
Retailer 2
-
$4,259 NZD
$2,396 USD
View
B
Retailer 3
-
$4,292 NZD
$2,414 USD
View
B
Retailer 4
-
$4,406 NZD
$2,478 USD
View
Final sale: no returns
B
Retailer 5
-
$4,552 NZD
$2,560 USD
View
Most Expensive
B
77 Diamonds
CUSDHY3SAUEMT · Nov 3
$6,544 NZD
£2,898 GBP
View
5 more retailers have this diamond
Prices start from $4,201 NZDSave up to $2,344 NZD

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
$4,201 NZD