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Cushion|Natural|GIA

1.51ct F SI1 Cushion Natural Diamond

VG • F/SI1 • GIA 1545346290

Certificate GIA 1545346290

Diamond specifications and retailer prices

From $5,443 AUD
HK$29,800 HKD
As of November 1, 2026
Save $7,197 AUD (57%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $12,640 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 SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 1545346290. Listed at 18 retailers as of October 28, 2026, with prices from $5,443 to $12,640, a $7,197 spread on the same certified stone. Queensmith lists it at $12,640. 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
F
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1545346290
Dimensions7.47 × 5.88 × 4.12 mm
L/W Ratio1.27
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
7.47 mm5.88 mm1.51 ctF / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1545346290
Side View
Table 62.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 70.1%

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: $12,640 AUD|Low: $5,388 AUD|High: $12,730 AUD|Avg: $7,860 AUD|+2.1%
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
Retailer 14
Retailer 15
November 2, 2026
Retailer 12$5,443 AUD
Retailer 2$5,848 AUD
Retailer 14$6,353 AUD
Retailer 6$6,417 AUD
Retailer 3$6,634 AUD
Retailer 15$6,919 AUD
Retailer 9$7,147 AUD
Retailer 13$7,187 AUD
Retailer 4$7,263 AUD
Retailer 7$7,302 AUD
Retailer 5$7,404 AUD
Retailer 8$8,132 AUD
Retailer 11$8,835 AUD
Retailer 10$11,447 AUD
Queensmith$12,640 AUD

28 data points across 15 retailers

18 retailers$5,443 AUD to $12,640 AUD

A
Cheapest Retailer
-
$5,443 AUD
HK$29,800 HKD
A
Retailer 2
-
$5,848 AUD
₹390,355 INR
View
A
Retailer 3
-
$6,353 AUD
$4,452 USD
View
A
Retailer 4
-
$6,417 AUD
SGD 6,077 SGD
View
A
Retailer 5
-
$6,634 AUD
$4,649 USD
View
Final sale: no returns
A
Retailer 6
-
$6,672 AUD
$4,676 USD
View
A
Retailer 7
-
$6,678 AUD
$4,680 USD
View
A
Retailer 8
-
$6,919 AUD
SGD 6,553 SGD
View
A
Retailer 9
-
$7,147 AUD
£3,944 GBP
View
A
Retailer 10
-
$7,187 AUD
$5,037 USD
View
B+
Retailer 11
-
$7,263 AUD
$5,090 USD
View
Retailer 12
-
$7,302 AUD
View
Price last confirmed 24 days ago
B+
Retailer 13
-
$7,390 AUD
View
B+
Retailer 14
-
$7,404 AUD
$5,189 USD
View
B+
Retailer 15
-
$8,132 AUD
€5,428 EUR
View
B+
Retailer 16
-
$8,835 AUD
ZAR 100,023 ZAR
View
B
Retailer 17
-
$11,447 AUD
£6,317 GBP
View
Most Expensive
B
Queensmith
1545346290 · Oct 28
$12,640 AUD
£6,975 GBP
View
17 more retailers have this diamond
Prices start from $5,443 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
$5,443 AUD