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Cushion|Natural|GIA

0.66ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 3305996154

Certificate GIA 3305996154

Diamond specifications and retailer prices

From $1,405 AUD
$985 USD
As of October 28, 2026
Save $1,537 AUD (52%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $2,943 AUD at MOH London · As of November 1, 2026
View at MOH London

About this 0.66ct natural cushion diamond

This 0.66ct natural cushion sits in the half to three-quarter carat band, graded I 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 3305996154. Listed at 5 retailers as of October 28, 2026, with prices from $1,405 to $2,943, a $1,537 spread on the same certified stone. MOH London lists it at $2,943. 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

0.66
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 3305996154
Dimensions4.89 × 4.69 × 3.44 mm
L/W Ratio1.04
Top View
4.89 mm4.69 mm0.66 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryGood
FluorescenceNone
CertificateGIA 3305996154
Side View
Table 62.0%CrownGirdle: STK-ETKPavilionCulet: NoneDepth 73.4%

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: Oct 28
Current: $2,943 AUD|Low: $1,405 AUD|High: $2,979 AUD|Avg: $2,084 AUD|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 1, 2026
Retailer 4$1,405 AUD
Retailer 2$1,832 AUD
Retailer 5$2,077 AUD
Retailer 3$2,252 AUD
MOH London$2,943 AUD

31 data points across 5 retailers

5 retailers$1,405 AUD to $2,943 AUD

B+
Cheapest Retailer
-
$1,405 AUD
$985 USD
B
Retailer 2
-
$1,832 AUD
£1,011 GBP
View
Retailer 3
-
$2,077 AUD
View
Price last confirmed 34 days ago
B
Retailer 4
-
$2,252 AUD
€1,503 EUR
View
Most Expensive
B
MOH London
7134860C5 · Nov 1
$2,943 AUD
£1,624 GBP
View
4 more retailers have this diamond
Prices start from $1,405 AUDSave up to $1,537 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+
0.66ct Cushion
$1,405 AUD