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Cushion|Natural|GIA

1.51ct I SI1 Cushion Natural Diamond

VG • I/SI1 • GIA 1235579975

Certificate GIA 1235579975

Diamond specifications and retailer prices

From $9,664 AUD
As of November 6, 2026
Save $8,437 AUD (47%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $18,101 AUD at MOH London · As of November 4, 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 I 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 1235579975. Listed at 22 retailers as of November 4, 2026, with prices from $9,664 to $18,101, a $8,437 spread on the same certified stone. MOH London lists it at $18,101. 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
I
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1235579975
Dimensions6.68 × 6.64 × 4.43 mm
L/W Ratio1.01
Top View
6.68 mm6.64 mm1.51 ctI / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1235579975
Side View
Table 70.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 66.7%

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 6
Current: $18,101 AUD|Low: $9,076 AUD|High: $18,367 AUD|Avg: $12,659 AUD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 10$9,664 AUD
Retailer 8$9,722 AUD
Retailer 6$10,891 AUD
Retailer 9$10,891 AUD
Retailer 3$11,199 AUD
Retailer 2$12,023 AUD
Retailer 7$12,348 AUD
Retailer 4$13,457 AUD
Retailer 5$15,887 AUD
MOH London$18,101 AUD

46 data points across 10 retailers

22 retailers$9,664 AUD to $18,101 AUD

B
Cheapest Retailer
-
$9,664 AUD
Retailer 2
-
$9,722 AUD
View
Price last confirmed 19 days ago
B
Retailer 3
-
$10,115 AUD
View
B
Retailer 4
-
$10,197 AUD
View
B
Retailer 5
-
$10,466 AUD
View
B
Retailer 6
-
$10,767 AUD
View
B
Retailer 7
-
$10,865 AUD
View
B
Retailer 8
-
$10,891 AUD
View
Final sale: no returns
Retailer 9
-
$10,891 AUD
View
Price last confirmed 9 days ago
B
Retailer 10
-
$11,081 AUD
View
B
Retailer 11
-
$11,199 AUD
View
B
Retailer 12
-
$12,023 AUD
View
B
Retailer 13
-
$12,174 AUD
View
Retailer 14
-
$12,348 AUD
View
Price last confirmed 15 days ago
B
Retailer 15
-
$12,492 AUD
View
B
Retailer 16
-
$12,968 AUD
View
B
Retailer 17
-
$12,968 AUD
View
B
Retailer 18
-
$13,404 AUD
View
B
Retailer 19
-
$13,457 AUD
View
Retailer 20
-
$14,340 AUD
View
Price last confirmed 15 days ago
B
Retailer 21
-
$15,887 AUD
View
Most Expensive
B
MOH London
B8380E7D5 · Nov 4
$18,101 AUD
£9,793 GBP
View
21 more retailers have this diamond
Prices start from $9,664 AUDSave up to $8,437 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
$9,664 AUD