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Cushion|Natural|GIA

1.51ct D SI2 Cushion Natural Diamond

GD • D/SI2 • GIA 1425646526

Certificate GIA 1425646526

Diamond specifications and retailer prices

From $5,028 AUD
$3,532 USD
As of October 31, 2026
Save $2,218 AUD (31%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $7,247 AUD at 77 Diamonds · As of November 2, 2026
View at 77 Diamonds

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1425646526. Listed at 11 retailers as of October 31, 2026, with prices from $5,028 to $7,247, a $2,218 spread on the same certified stone. 77 Diamonds lists it at $7,247. 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
D
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1425646526
Dimensions6.95 × 6.28 × 4.26 mm
L/W Ratio1.11
Culet sizeNone
Key to symbols
Crystal, Feather
Top View
6.95 mm6.28 mm1.51 ctD / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1425646526
Side View
Table 59.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 67.9%

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: Oct 31
Current: $7,247 AUD|Low: $4,964 AUD|High: $7,273 AUD|Avg: $6,378 AUD|+2.1%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 5$5,028 AUD
Retailer 3$5,125 AUD
Retailer 4$6,317 AUD
Retailer 7$6,705 AUD
Retailer 8$6,705 AUD
Retailer 6$6,933 AUD
Retailer 2$6,985 AUD
77 Diamonds$7,247 AUD

40 data points across 8 retailers

11 retailers$5,028 AUD to $7,247 AUD

A
Cheapest Retailer
-
$5,028 AUD
$3,532 USD
A
Retailer 2
-
$5,134 AUD
$3,606 USD
View
A
Retailer 3
-
$5,188 AUD
$3,644 USD
View
A
Retailer 4
-
$5,250 AUD
$3,688 USD
View
A
Retailer 5
-
$5,442 AUD
View
B+
Retailer 6
-
$6,317 AUD
$4,437 USD
View
B+
Retailer 7
-
$6,705 AUD
$4,710 USD
View
B+
Retailer 8
-
$6,705 AUD
$4,710 USD
View
B+
Retailer 9
-
$6,933 AUD
$4,870 USD
View
B+
Retailer 10
-
$6,985 AUD
€4,673 EUR
View
Most Expensive
B+
77 Diamonds
CUSMBKG4TCX2Z · Nov 2
$7,247 AUD
£4,008 GBP
View
10 more retailers have this diamond
Prices start from $5,028 AUDSave up to $2,218 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
$5,028 AUD