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Cushion|Natural|GIA

1.51ct K SI2 Cushion Natural Diamond

GD • K/SI2 • GIA 6562373069

Certificate GIA 6562373069

Diamond specifications and retailer prices

From $3,502 AUD
As of November 6, 2026
Save $1,474 AUD (30%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $4,976 AUD at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6562373069. Listed at 6 retailers as of October 31, 2026, with prices from $3,502 to $4,976, a $1,474 spread on the same certified stone. Blue Nile lists it at $4,976. 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
K
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6562373069
Dimensions7.77 × 5.89 × 3.98 mm
L/W Ratio1.32
Top View
7.77 mm5.89 mm1.51 ctK / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6562373069
Side View
Table 61.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 67.5%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: $4,976 AUD|Low: $3,464 AUD|High: $5,401 AUD|Avg: $4,299 AUD|-1.7%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 3$3,502 AUD
Retailer 2$3,538 AUD
Retailer 6$4,039 AUD
Retailer 5$4,388 AUD
Retailer 4$4,862 AUD
Blue Nile$4,976 AUD

42 data points across 6 retailers

6 retailers$3,502 AUD to $4,976 AUD

A
Cheapest Retailer
-
$3,502 AUD
A
Retailer 2
-
$3,538 AUD
View
Retailer 3
-
$4,039 AUD
View
Price last confirmed 9 days ago
B+
Retailer 4
-
$4,388 AUD
View
Retailer 5
-
$4,862 AUD
View
Price last confirmed 10 days ago
Most Expensive
B+
Blue Nile
30380905 · Oct 31
$4,976 AUD
$3,419 USD
View
5 more retailers have this diamond
Prices start from $3,502 AUDSave up to $1,474 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
$3,502 AUD