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Cushion|Natural|GIA

1.05ct D SI1 Cushion Natural Diamond

EX • D/SI1 • GIA 6243087579

Certificate GIA 6243087579

Diamond specifications and retailer prices

From $4,400 AUD
$3,091 USD
As of October 31, 2026
Save $675 AUD (13%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $5,075 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6243087579. Listed at 2 retailers as of October 31, 2026, with prices from $4,400 to $5,075, a $675 spread on the same certified stone. 77 Diamonds lists it at $5,075. 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
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6243087579
Dimensions6.71 × 5.50 × 3.73 mm
L/W Ratio1.22
Top View
6.71 mm5.50 mm1.05 ctD / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6243087579
Side View
Table 59.0%CrownGirdle: THN-VTKPavilionCulet: LargeDepth 67.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 31
Current: $5,075 AUD|Low: $4,400 AUD|High: $5,075 AUD|Avg: $4,915 AUD|+1.0%
77 Diamonds
Retailer 2
November 2, 2026
Retailer 2$4,400 AUD
77 Diamonds$5,075 AUD

12 data points across 2 retailers

2 retailers$4,400 AUD to $5,075 AUD

B+
Cheapest Retailer
-
$4,400 AUD
$3,091 USD
Most Expensive
B
77 Diamonds
CUSJE885KNRT · Nov 2
$5,075 AUD
£2,807 GBP
View
1 more retailer has this diamond
Prices start from $4,400 AUDSave up to $675 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
$4,400 AUD