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Cushion|Natural|GIA

1.51ct H SI2 Cushion Natural Diamond

EX • H/SI2 • GIA 2554189099

Certificate GIA 2554189099

Diamond specifications and retailer prices

From $3,169 AUD
SGD 3,001 SGD
As of October 31, 2026
Save $2,746 AUD (46%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $5,915 AUD at Helzberg Diamonds · As of November 1, 2026
View at Helzberg Diamonds

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 2554189099. Listed at 12 retailers as of October 31, 2026, with prices from $3,169 to $5,915, a $2,746 spread on the same certified stone. Helzberg Diamonds lists it at $5,915. 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
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2554189099
Dimensions6.87 × 6.11 × 4.21 mm
L/W Ratio1.12
Top View
6.87 mm6.11 mm1.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2554189099
Side View
Table 62.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 68.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $5,915 AUD|Low: $3,169 AUD|High: $6,415 AUD|Avg: $4,285 AUD|-7.8%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 9$3,169 AUD
Retailer 7$3,383 AUD
Retailer 6$3,442 AUD
Retailer 4$3,703 AUD
Retailer 2$3,719 AUD
Retailer 12$3,747 AUD
Retailer 10$4,051 AUD
Retailer 8$4,081 AUD
Retailer 11$4,231 AUD
Retailer 5$4,854 AUD
Retailer 3$5,889 AUD
Helzberg Diamonds$5,915 AUD

28 data points across 12 retailers

12 retailers$3,169 AUD to $5,915 AUD

A
Cheapest Retailer
-
$3,169 AUD
SGD 3,001 SGD
A
Retailer 2
-
$3,383 AUD
$2,371 USD
View
A
Retailer 3
-
$3,442 AUD
$2,412 USD
View
A
Retailer 4
-
$3,703 AUD
$2,595 USD
View
A
Retailer 5
-
$3,719 AUD
£2,052 GBP
View
A
Retailer 6
-
$3,747 AUD
SGD 3,549 SGD
View
A
Retailer 7
-
$4,051 AUD
$2,839 USD
View
A
Retailer 8
-
$4,081 AUD
$2,860 USD
View
A
Retailer 9
-
$4,231 AUD
$2,965 USD
View
A
Retailer 10
-
$4,854 AUD
$3,402 USD
View
A
Retailer 11
-
$5,889 AUD
$4,127 USD
View
Most Expensive
A
Helzberg Diamonds
XZRILLKHOPGPP · Nov 1
$5,915 AUD
$4,145 USD
View
11 more retailers have this diamond
Prices start from $3,169 AUDSave up to $2,746 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
$3,169 AUD