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Cushion|Natural|GIA

1.51ct I SI1 Cushion Natural Diamond

GD • I/SI1 • GIA 6545925688

Certificate GIA 6545925688

Diamond specifications and retailer prices

From $5,253 AUD
As of November 6, 2026
Save $5,781 AUD (52%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $11,033 AUD at Wholesale Diamonds Direct · As of November 6, 2026
View at Wholesale Diamonds Direct

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6545925688. Listed at 21 retailers as of November 6, 2026, with prices from $5,253 to $11,033, a $5,781 spread on the same certified stone. Wholesale Diamonds Direct lists it at $11,033. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
I
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6545925688
Dimensions7.45 × 5.71 × 4.15 mm
L/W Ratio1.30
Top View
7.45 mm5.71 mm1.51 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6545925688
Side View
Table 67.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 72.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $6,856 AUD|Low: $5,253 AUD|High: $11,573 AUD|Avg: $7,201 AUD|-4.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Wholesale Diamonds Direct
November 7, 2026
Retailer 18$5,253 AUD
Retailer 6$6,027 AUD
Retailer 17$6,030 AUD
Retailer 9$6,129 AUD
Retailer 7$6,168 AUD
Retailer 2$6,292 AUD
Retailer 4$6,380 AUD
Retailer 3$6,411 AUD
Retailer 11$6,549 AUD
Retailer 12$6,555 AUD
Retailer 10$6,637 AUD
Retailer 14$6,676 AUD
Retailer 1$6,856 AUD
Retailer 5$6,951 AUD
Retailer 8$7,163 AUD
Retailer 13$7,817 AUD
Retailer 15$8,475 AUD
Retailer 16$11,032 AUD
Wholesale Diamonds Direct$11,033 AUD

20 data points across 19 retailers

21 retailers$5,253 AUD to $11,033 AUD

A
Cheapest Retailer
-
$5,253 AUD
B+
Retailer 2
-
$6,027 AUD
View
B+
Retailer 3
-
$6,030 AUD
View
Retailer 4
-
$6,129 AUD
View
Price last confirmed 9 days ago
Retailer 5
-
$6,168 AUD
View
Price last confirmed 10 days ago
B+
Retailer 6
-
$6,292 AUD
View
B+
Retailer 7
-
$6,380 AUD
View
B+
Retailer 8
-
$6,411 AUD
View
Final sale: no returns
B+
Retailer 9
-
$6,549 AUD
View
B+
Retailer 10
-
$6,555 AUD
View
Retailer 11
-
$6,637 AUD
View
Price last confirmed 8 days ago
B+
Retailer 12
-
$6,676 AUD
View
B+
Retailer 13
-
$6,856 AUD
View
B+
Retailer 14
-
$6,951 AUD
View
Retailer 15
-
$7,163 AUD
View
Price last confirmed 18 days ago
Retailer 16
-
$7,334 AUD
View
Price last confirmed 29 days ago
B+
Retailer 17
-
$7,357 AUD
View
B+
Retailer 18
-
$7,817 AUD
View
B
Retailer 19
-
$8,475 AUD
View
B
Retailer 20
-
$11,032 AUD
View
Most Expensive
B
Wholesale Diamonds Direct
625981062 · Nov 6
$11,033 AUD
$7,581 USD
View
20 more retailers have this diamond
Prices start from $5,253 AUDSave up to $5,781 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.

A
1.51ct Cushion
$5,253 AUD