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Cushion|Natural|GIA

1.51ct H SI2 Cushion Natural Diamond

EX • H/SI2 • GIA 6551533295

Certificate GIA 6551533295

Diamond specifications and retailer prices

From $5,041 AUD
HK$27,600 HKD
As of November 1, 2026
Save $7,227 AUD (59%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $12,268 AUD at Queensmith · As of October 28, 2026
View at Queensmith

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 6551533295. Listed at 15 retailers as of October 28, 2026, with prices from $5,041 to $12,268, a $7,227 spread on the same certified stone. Queensmith lists it at $12,268. 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 6551533295
Dimensions7.61 × 5.86 × 4.02 mm
L/W Ratio1.30
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Needle, Indented Natural, Natural
Top View
7.61 mm5.86 mm1.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6551533295
Side View
Table 64.0%CrownGirdle: THK-VTKPavilionCulet: 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 1
Current: $12,268 AUD|Low: $5,004 AUD|High: $12,341 AUD|Avg: $7,284 AUD|+2.3%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 2, 2026
Retailer 10$5,041 AUD
Retailer 2$5,392 AUD
Retailer 5$5,938 AUD
Retailer 3$6,216 AUD
Retailer 12$6,415 AUD
Retailer 6$6,524 AUD
Retailer 8$6,697 AUD
Retailer 11$6,735 AUD
Retailer 4$6,949 AUD
Retailer 13$7,127 AUD
Retailer 7$7,620 AUD
Retailer 9$10,726 AUD
Queensmith$12,268 AUD

24 data points across 13 retailers

15 retailers$5,041 AUD to $12,268 AUD

A
Cheapest Retailer
-
$5,041 AUD
HK$27,600 HKD
A
Retailer 2
-
$5,392 AUD
₹359,882 INR
View
A
Retailer 3
-
$5,938 AUD
SGD 5,624 SGD
View
B+
Retailer 4
-
$6,174 AUD
$4,327 USD
View
A
Retailer 5
-
$6,216 AUD
$4,356 USD
View
Final sale: no returns
B+
Retailer 6
-
$6,415 AUD
SGD 6,075 SGD
View
A
Retailer 7
-
$6,524 AUD
£3,600 GBP
View
B+
Retailer 8
-
$6,697 AUD
£3,695 GBP
View
B+
Retailer 9
-
$6,735 AUD
$4,720 USD
View
B+
Retailer 10
-
$6,917 AUD
View
B+
Retailer 11
-
$6,949 AUD
$4,870 USD
View
B+
Retailer 12
-
$7,127 AUD
$4,995 USD
View
B+
Retailer 13
-
$7,620 AUD
€5,086 EUR
View
B
Retailer 14
-
$10,726 AUD
£5,919 GBP
View
Most Expensive
B
Queensmith
6551533295 · Oct 28
$12,268 AUD
£6,770 GBP
View
14 more retailers have this diamond
Prices start from $5,041 AUDSave up to $7,227 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
$5,041 AUD