CaratHunter
Plans
Cushion|Natural|GIA

1.51ct E SI2 Cushion Natural Diamond

EX • E/SI2 • GIA 6545580701

Certificate GIA 6545580701

Diamond specifications and retailer prices

From $6,340 AUD
HK$34,800 HKD
As of October 29, 2026
Save $7,308 AUD (54%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $13,648 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 E 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 6545580701. Listed at 14 retailers as of October 28, 2026, with prices from $6,340 to $13,648, a $7,308 spread on the same certified stone. Queensmith lists it at $13,648. 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
E
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6545580701
Dimensions7.65 × 5.87 × 4.01 mm
L/W Ratio1.30
Top View
7.65 mm5.87 mm1.51 ctE / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6545580701
Side View
Table 67.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 68.4%

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: Oct 29
Current: $13,648 AUD|Low: $6,340 AUD|High: $13,748 AUD|Avg: $9,027 AUD|+2.0%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 9$6,340 AUD
Retailer 5$6,839 AUD
Retailer 8$7,292 AUD
Retailer 3$7,526 AUD
Retailer 10$7,789 AUD
Retailer 2$8,232 AUD
Retailer 11$8,355 AUD
Retailer 4$8,489 AUD
Retailer 12$8,661 AUD
Retailer 7$9,208 AUD
Retailer 6$12,500 AUD
Queensmith$13,648 AUD

32 data points across 12 retailers

14 retailers$6,340 AUD to $13,648 AUD

A
Cheapest Retailer
-
$6,340 AUD
HK$34,800 HKD
A
Retailer 2
-
$6,839 AUD
₹457,563 INR
View
A
Retailer 3
-
$7,292 AUD
SGD 6,923 SGD
View
A
Retailer 4
-
$7,526 AUD
SGD 7,145 SGD
View
A
Retailer 5
-
$7,789 AUD
$5,472 USD
View
Final sale: no returns
A
Retailer 6
-
$7,826 AUD
$5,498 USD
View
A
Retailer 7
-
$8,232 AUD
£4,554 GBP
View
B+
Retailer 8
-
$8,355 AUD
$5,870 USD
View
Retailer 9
-
$8,489 AUD
$5,964 USD
View
Price last confirmed 14 days ago
B+
Retailer 10
-
$8,661 AUD
$6,085 USD
View
B+
Retailer 11
-
$8,825 AUD
View
B+
Retailer 12
-
$9,208 AUD
€6,161 EUR
View
B+
Retailer 13
-
$12,500 AUD
£6,915 GBP
View
Most Expensive
B
Queensmith
6545580701 · Oct 28
$13,648 AUD
£7,550 GBP
View
13 more retailers have this diamond
Prices start from $6,340 AUDSave up to $7,308 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
$6,340 AUD