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Cushion|Natural|GIA

1.51ct F SI2 Cushion Natural Diamond

EX • F/SI2 • GIA 5543528221

Certificate GIA 5543528221

Diamond specifications and retailer prices

From $5,461 AUD
HK$29,900 HKD
As of November 1, 2026
Save $7,197 AUD (57%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $12,658 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 F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5543528221. Listed at 13 retailers as of October 28, 2026, with prices from $5,461 to $12,658, a $7,197 spread on the same certified stone. Queensmith lists it at $12,658. 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
F
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5543528221
Dimensions7.60 × 5.85 × 4.07 mm
L/W Ratio1.30
Top View
7.60 mm5.85 mm1.51 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5543528221
Side View
Table 63.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 69.6%

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: $12,658 AUD|Low: $5,406 AUD|High: $12,749 AUD|Avg: $8,037 AUD|+1.7%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 7$5,461 AUD
Retailer 2$5,841 AUD
Retailer 3$6,434 AUD
Retailer 9$6,659 AUD
Retailer 5$7,175 AUD
Retailer 8$7,216 AUD
Retailer 10$7,291 AUD
Retailer 11$7,432 AUD
Retailer 4$8,164 AUD
Retailer 6$11,493 AUD
Queensmith$12,658 AUD

32 data points across 11 retailers

13 retailers$5,461 AUD to $12,658 AUD

A
Cheapest Retailer
-
$5,461 AUD
HK$29,900 HKD
A
Retailer 2
-
$5,841 AUD
₹389,880 INR
View
A
Retailer 3
-
$6,434 AUD
SGD 6,093 SGD
View
A
Retailer 4
-
$6,659 AUD
$4,667 USD
View
Final sale: no returns
A
Retailer 5
-
$6,689 AUD
$4,688 USD
View
A
Retailer 6
-
$7,175 AUD
£3,959 GBP
View
A
Retailer 7
-
$7,216 AUD
$5,057 USD
View
A
Retailer 8
-
$7,291 AUD
$5,110 USD
View
A
Retailer 9
-
$7,432 AUD
$5,209 USD
View
B+
Retailer 10
-
$7,566 AUD
View
B+
Retailer 11
-
$8,164 AUD
€5,449 EUR
View
B+
Retailer 12
-
$11,493 AUD
£6,342 GBP
View
Most Expensive
B
Queensmith
5543528221 · Oct 28
$12,658 AUD
£6,985 GBP
View
12 more retailers have this diamond
Prices start from $5,461 AUDSave up to $7,197 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
$5,461 AUD