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Cushion|Natural|GIA

1.51ct J SI2 Cushion Natural Diamond

EX • J/SI2 • GIA 6545750220

Certificate GIA 6545750220

Diamond specifications and retailer prices

From $4,774 AUD
$3,346 USD
As of November 1, 2026
Save $2,506 AUD (34%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $9,054 AUD at MOH London · As of October 11, 2026
View at MOH London

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded J 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 6545750220. Listed at 17 retailers as of November 1, 2026, with a 52% 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
J
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.68°
OriginNatural
Grading LabGIA
CertificateGIA 6545750220
Dimensions7.72 × 6.20 × 4.31 mm
L/W Ratio1.25
Top View
7.72 mm6.20 mm1.51 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6545750220
Side View
Table 69.0%Crown 32.68°Girdle: MED-VTKPavilionCulet: NoneDepth 69.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $9,054 AUD|Low: $4,167 AUD|High: $10,460 AUD|Avg: $5,647 AUD|-12.5%
MOH London
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
Retailer 19
Retailer 20
November 2, 2026
Retailer 12$4,231 AUD
Retailer 10$4,302 AUD
Retailer 9$4,472 AUD
Retailer 8$4,593 AUD
Retailer 18$4,774 AUD
Retailer 6$4,847 AUD
Retailer 7$4,862 AUD
Retailer 14$4,880 AUD
Retailer 13$4,897 AUD
Retailer 15$5,218 AUD
Retailer 4$5,344 AUD
Retailer 20$5,406 AUD
Retailer 17$5,849 AUD
Retailer 11$6,057 AUD
Retailer 16$6,193 AUD
Retailer 19$6,193 AUD
Retailer 5$6,237 AUD
Retailer 3$6,407 AUD
Retailer 2$7,281 AUD
MOH London$9,054 AUD

41 data points across 20 retailers

17 retailers$4,774 AUD to $7,281 AUD

Retailer 1
-
$4,231 AUD
$2,965 USD
Price last confirmed 28 days ago
Retailer 2
-
$4,302 AUD
$3,015 USD
View
Price last confirmed 18 days ago
Retailer 3
-
$4,593 AUD
$3,219 USD
View
Price last confirmed 23 days ago
B+
Retailer 4
-
$4,774 AUD
$3,346 USD
View
Retailer 5
-
$4,847 AUD
$3,397 USD
View
Price last confirmed 21 days ago
Retailer 6
-
$4,862 AUD
$3,408 USD
View
Price last confirmed 19 days ago
B+
Retailer 7
-
$4,880 AUD
$3,420 USD
View
B+
Retailer 8
-
$4,897 AUD
$3,432 USD
View
B+
Retailer 9
-
$5,218 AUD
CA$5,079 CAD
View
B+
Retailer 10
-
$5,406 AUD
$3,788 USD
View
B+
Retailer 11
-
$5,849 AUD
$4,099 USD
View
Retailer 12
-
$6,057 AUD
$4,245 USD
View
Price last confirmed 20 days ago
B+
Retailer 13
-
$6,193 AUD
$4,340 USD
View
B+
Retailer 14
-
$6,193 AUD
$4,340 USD
View
B
Retailer 15
-
$6,407 AUD
$4,490 USD
View
B
Retailer 16
-
$7,281 AUD
£4,018 GBP
View
Most Expensive
MOH London
AAAA8D4D5 · Oct 11
$9,054 AUD
£4,996 GBP
View
Price last confirmed 22 days ago
16 more retailers have this diamond
Prices start from $4,774 AUDSave up to $2,506 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.

B+
1.51ct Cushion
$4,774 AUD