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Cushion|Natural|GIA

1.51ct H SI1 Cushion Natural Diamond

VG • H/SI1 • GIA 1257122355

Certificate GIA 1257122355

Diamond specifications and retailer prices

From $10,452 AUD
$7,325 USD
As of November 2, 2026
Save $9,201 AUD (47%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $19,653 AUD at MOH London · As of November 2, 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 1257122355. Listed at 20 retailers as of November 2, 2026, with prices from $10,452 to $19,653, a $9,201 spread on the same certified stone. MOH London lists it at $19,653. 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
PolishVery Good
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1257122355
Dimensions6.67 × 6.35 × 4.29 mm
L/W Ratio1.05
Top View
6.67 mm6.35 mm1.51 ctH / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateGIA 1257122355
Side View
Table 65.0%CrownGirdle: MED-EXTPavilionCulet: NoneDepth 67.5%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $19,653 AUD|Low: $10,452 AUD|High: $19,890 AUD|Avg: $13,449 AUD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 3$10,452 AUD
Retailer 7$10,516 AUD
Retailer 8$11,043 AUD
Retailer 11$11,793 AUD
Retailer 9$12,000 AUD
Retailer 6$13,033 AUD
Retailer 10$13,156 AUD
Retailer 4$13,173 AUD
Retailer 2$14,642 AUD
Retailer 5$17,325 AUD
MOH London$19,653 AUD

44 data points across 11 retailers

20 retailers$10,452 AUD to $19,653 AUD

B
Cheapest Retailer
-
$10,452 AUD
$7,325 USD
B
Retailer 2
-
$10,516 AUD
$7,370 USD
View
B
Retailer 3
-
$10,976 AUD
$7,692 USD
View
B
Retailer 4
-
$11,043 AUD
$7,739 USD
View
B
Retailer 5
-
$11,362 AUD
$7,962 USD
View
B
Retailer 6
-
$11,499 AUD
CA$11,193 CAD
View
B
Retailer 7
-
$11,729 AUD
$8,220 USD
View
B
Retailer 8
-
$11,793 AUD
$8,265 USD
View
B
Retailer 9
-
$12,000 AUD
$8,410 USD
View
Retailer 10
-
$13,033 AUD
View
Price last confirmed 9 days ago
B
Retailer 11
-
$13,156 AUD
$9,220 USD
View
B
Retailer 12
-
$13,173 AUD
£7,269 GBP
View
B
Retailer 13
-
$13,558 AUD
$9,502 USD
View
B
Retailer 14
-
$13,969 AUD
$9,790 USD
View
B
Retailer 15
-
$13,969 AUD
$9,790 USD
View
B
Retailer 16
-
$14,426 AUD
$10,110 USD
View
B
Retailer 17
-
$14,642 AUD
€9,773 EUR
View
Retailer 18
-
$15,525 AUD
$10,880 USD
View
Price last confirmed 10 days ago
B
Retailer 19
-
$17,325 AUD
ZAR 196,151 ZAR
View
Most Expensive
B
MOH London
353BC0986 · Nov 2
$19,653 AUD
£10,845 GBP
View
19 more retailers have this diamond
Prices start from $10,452 AUDSave up to $9,201 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
$10,452 AUD