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Cushion|Natural|GIA

1.51ct H SI2 Cushion Natural Diamond

EX • H/SI2 • GIA 2457470388

Certificate GIA 2457470388

Diamond specifications and retailer prices

From $6,910 AUD
$4,854 USD
As of November 2, 2026
Save $2,641 AUD (28%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $10,473 AUD at GemsNY · As of October 8, 2026
View at GemsNY

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2457470388. Listed at 15 retailers as of November 2, 2026, with a 38% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.51
Carat
H
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2457470388
Dimensions6.85 × 6.36 × 4.36 mm
L/W Ratio1.08
Top View
6.85 mm6.36 mm1.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2457470388
Side View
Table 63.0%CrownGirdle: ThickPavilionCulet: NoneDepth 68.6%

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 2
Current: $10,473 AUD|Low: $6,643 AUD|High: $10,473 AUD|Avg: $8,338 AUD|+3.7%
GemsNY
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
November 2, 2026
Retailer 7$6,910 AUD
Retailer 6$7,027 AUD
Retailer 11$7,283 AUD
Retailer 8$7,334 AUD
Retailer 3$7,507 AUD
Retailer 10$7,833 AUD
Retailer 9$8,294 AUD
Retailer 13$8,488 AUD
Retailer 5$8,516 AUD
Retailer 4$9,097 AUD
Retailer 12$9,097 AUD
Retailer 14$9,396 AUD
Retailer 2$9,551 AUD
GemsNY$10,473 AUD

39 data points across 14 retailers

15 retailers$6,910 AUD to $9,551 AUD

A
Cheapest Retailer
-
$6,910 AUD
$4,854 USD
B+
Retailer 2
-
$7,027 AUD
$4,936 USD
View
Retailer 3
-
$7,214 AUD
$5,068 USD
View
Price last confirmed 97 days ago
B+
Retailer 4
-
$7,334 AUD
$5,152 USD
View
Retailer 5
-
$7,507 AUD
$5,273 USD
View
Price last confirmed 26 days ago
B+
Retailer 6
-
$7,584 AUD
CA$7,399 CAD
View
B+
Retailer 7
-
$7,833 AUD
$5,502 USD
View
B
Retailer 8
-
$8,294 AUD
$5,826 USD
View
Retailer 9
-
$8,488 AUD
$5,963 USD
View
Price last confirmed 26 days ago
B
Retailer 10
-
$8,516 AUD
$5,982 USD
View
B
Retailer 11
-
$9,097 AUD
$6,390 USD
View
B
Retailer 12
-
$9,097 AUD
$6,390 USD
View
B
Retailer 13
-
$9,396 AUD
$6,600 USD
View
B
Retailer 14
-
$9,551 AUD
£5,283 GBP
View
Most Expensive
GemsNY
N209508 · Oct 8
$10,473 AUD
$7,357 USD
View
Price last confirmed 25 days ago
14 more retailers have this diamond
Prices start from $6,910 AUDSave up to $2,641 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
$6,910 AUD