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Cushion|Natural|GIA

1.51ct H SI1 Cushion Natural Diamond

EX • H/SI1 • GIA 7556576837

Certificate GIA 7556576837

Diamond specifications and retailer prices

From $4,329 AUD
HK$23,700 HKD
As of November 1, 2026
Save $5,464 AUD (56%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $9,793 AUD at MOH London · As of November 1, 2026
View at MOH London

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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7556576837. Listed at 10 retailers as of November 1, 2026, with prices from $4,329 to $9,793, a $5,464 spread on the same certified stone. MOH London lists it at $9,793. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle35.76°
OriginNatural
Grading LabGIA
CertificateGIA 7556576837
Dimensions7.50 × 5.88 × 4.11 mm
L/W Ratio1.28
Key to symbols
Crystal, Cloud, Feather
Top View
7.50 mm5.88 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7556576837
Side View
Table 65.0%CrownGirdle: STK-VTKPavilion 35.76°Culet: NoneDepth 69.8%

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: $9,793 AUD|Low: $4,292 AUD|High: $10,188 AUD|Avg: $6,239 AUD|-3.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 6$4,329 AUD
Retailer 4$5,088 AUD
Retailer 5$5,210 AUD
Retailer 2$5,421 AUD
Retailer 8$5,459 AUD
Retailer 9$5,970 AUD
Retailer 7$6,264 AUD
Retailer 3$6,717 AUD
MOH London$9,793 AUD

34 data points across 9 retailers

10 retailers$4,329 AUD to $9,793 AUD

A
Cheapest Retailer
-
$4,329 AUD
HK$23,700 HKD
A
Retailer 2
-
$5,088 AUD
€3,396 EUR
View
A
Retailer 3
-
$5,210 AUD
$3,651 USD
View
A
Retailer 4
-
$5,421 AUD
£2,992 GBP
View
A
Retailer 5
-
$5,459 AUD
SGD 5,170 SGD
View
A
Retailer 6
-
$5,970 AUD
$4,184 USD
View
Final sale: no returns
A
Retailer 7
-
$6,264 AUD
$4,390 USD
View
B+
Retailer 8
-
$6,518 AUD
View
A
Retailer 9
-
$6,717 AUD
€4,483 EUR
View
Most Expensive
B+
MOH London
43437E97D · Nov 1
$9,793 AUD
£5,404 GBP
View
9 more retailers have this diamond
Prices start from $4,329 AUDSave up to $5,464 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
$4,329 AUD