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Cushion|Natural|GIA

1.05ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 2175213051

Certificate GIA 2175213051

Diamond specifications and retailer prices

From $8,145 AUD
$5,708 USD
As of October 31, 2026
Save $1,138 AUD (12%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $12,522 AUD at MOH London · As of November 1, 2026
View at MOH London

About this 1.05ct natural cushion diamond

This 1.05ct natural cushion sits in the classic one-carat band, graded F 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 2175213051. Listed at 7 retailers as of October 31, 2026, with a relatively tight 14% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2175213051
Dimensions6.38 × 5.88 × 3.91 mm
L/W Ratio1.09
Girdle conditionFaceted
Culet sizeNone
Cert comments
Additional clouds are not shown. Pinpoints are not shown.
Top View
6.38 mm5.88 mm1.05 ctF / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 2175213051
Side View
Table 57.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 66.4%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $12,522 AUD|Low: $8,145 AUD|High: $12,672 AUD|Avg: $9,552 AUD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
November 2, 2026
Retailer 4$8,145 AUD
Retailer 3$8,371 AUD
Retailer 2$9,283 AUD
MOH London$12,522 AUD

42 data points across 4 retailers

7 retailers$8,145 AUD to $9,283 AUD

B
Cheapest Retailer
-
$8,145 AUD
$5,708 USD
B
Retailer 2
-
$8,371 AUD
£4,619 GBP
View
B
Retailer 3
-
$8,690 AUD
$6,090 USD
View
B
Retailer 4
-
$8,690 AUD
$6,090 USD
View
B
Retailer 5
-
$8,975 AUD
$6,290 USD
View
B
Retailer 6
-
$9,283 AUD
€6,196 EUR
View
Most Expensive
MOH London
93D8ABE47 · Nov 1
$12,522 AUD
£6,910 GBP
View
Price under review
6 more retailers have this diamond
Prices start from $8,145 AUDSave up to $1,138 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
$8,145 AUD