Cushion|Natural|GIA

1.51ct H SI1 Cushion Natural Diamond

VG • H/SI1 • GIA 1428687763

Certificate GIA 1428687763

Diamond specifications and retailer prices

From $6,946 AUD
$4,868 USD
As of November 2, 2026
Save $8,022 AUD (54%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $14,968 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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 1428687763. Listed at 19 retailers as of November 1, 2026, with prices from $6,946 to $14,968, a $8,022 spread on the same certified stone. MOH London lists it at $14,968. 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
H
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1428687763
Dimensions6.69 × 5.94 × 4.13 mm
L/W Ratio1.13
Culet sizeNone
Top View
6.69 mm5.94 mm1.51 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1428687763
Side View
Table 61.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 69.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $14,968 AUD|Low: $7,486 AUD|High: $15,150 AUD|Avg: $10,494 AUD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 3$7,659 AUD
Retailer 6$8,412 AUD
Retailer 7$8,982 AUD
Retailer 8$8,982 AUD
Retailer 5$10,425 AUD
Retailer 2$11,733 AUD
Retailer 4$13,197 AUD
MOH London$14,968 AUD

44 data points across 8 retailers

19 retailers$6,946 AUD to $14,968 AUD

B+
Cheapest Retailer
-
$6,946 AUD
$4,868 USD
B+
Retailer 2
-
$7,659 AUD
£4,227 GBP
View
B+
Retailer 3
-
$7,724 AUD
$5,413 USD
View
B+
Retailer 4
-
$8,233 AUD
$5,770 USD
View
B+
Retailer 5
-
$8,233 AUD
$5,770 USD
View
B+
Retailer 6
-
$8,412 AUD
$5,895 USD
View
B
Retailer 7
-
$8,486 AUD
$5,947 USD
View
B
Retailer 8
-
$8,504 AUD
$5,960 USD
View
B
Retailer 9
-
$8,982 AUD
$6,295 USD
View
Final sale: no returns
B
Retailer 10
-
$8,982 AUD
$6,295 USD
View
B
Retailer 11
-
$9,018 AUD
$6,320 USD
View
B+
Retailer 12
-
$9,139 AUD
$6,405 USD
View
B
Retailer 13
-
$9,572 AUD
$6,708 USD
View
B
Retailer 14
-
$10,299 AUD
$7,218 USD
View
Retailer 15
-
$10,425 AUD
View
Price last confirmed 11 days ago
B
Retailer 16
-
$11,733 AUD
€7,831 EUR
View
Retailer 17
-
$11,835 AUD
$8,294 USD
View
Price last confirmed 10 days ago
B
Retailer 18
-
$13,197 AUD
ZAR 149,411 ZAR
View
Most Expensive
B
MOH London
86C3866EA · Nov 1
$14,968 AUD
£8,260 GBP
View
18 more retailers have this diamond
Prices start from $6,946 AUDSave up to $8,022 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.

B+
1.51ct Cushion
$6,946 AUD