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Cushion|Natural|GIA

1.51ct D SI2 Cushion Natural Diamond

GD • D/SI2 • GIA 1448393702

Certificate GIA 1448393702

Diamond specifications and retailer prices

From $4,213 AUD
$2,959 USD
As of October 31, 2026
Save $2,077 AUD (33%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $6,290 AUD at 77 Diamonds · As of November 1, 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 1448393702. Listed at 10 retailers as of October 31, 2026, with prices from $4,213 to $6,290, a $2,077 spread on the same certified stone. 77 Diamonds lists it at $6,290. 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
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 1448393702
Dimensions6.55 × 6.20 × 4.32 mm
L/W Ratio1.06
Culet sizeNone
Key to symbols
Crystal, Feather
Top View
6.55 mm6.20 mm1.51 ctD / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1448393702
Side View
Table 59.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 69.7%

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: $6,290 AUD|Low: $759 AUD|High: $6,304 AUD|Avg: $4,144 AUD|+2.1%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 1, 2026
Retailer 5$759 AUD
Retailer 4$4,261 AUD
Retailer 2$4,306 AUD
Retailer 3$5,317 AUD
77 Diamonds$6,290 AUD

32 data points across 5 retailers

10 retailers$4,213 AUD to $6,290 AUD

A
Cheapest Retailer
-
$4,213 AUD
$2,959 USD
A
Retailer 2
-
$4,261 AUD
$2,993 USD
View
Retailer 3
-
$4,306 AUD
$3,025 USD
View
Price last confirmed 11 days ago
A
Retailer 4
-
$4,321 AUD
$3,035 USD
View
A
Retailer 5
-
$4,503 AUD
$3,163 USD
View
B+
Retailer 6
-
$5,317 AUD
$3,735 USD
View
B+
Retailer 7
-
$5,623 AUD
$3,950 USD
View
B+
Retailer 8
-
$5,623 AUD
$3,950 USD
View
B+
Retailer 9
-
$5,808 AUD
$4,080 USD
View
Most Expensive
B+
77 Diamonds
CUSMBVCPXEWKD · Nov 1
$6,290 AUD
£3,479 GBP
View
9 more retailers have this diamond
Prices start from $4,213 AUDSave up to $2,077 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
$4,213 AUD