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Cushion|Natural|GIA

1.31ct K SI1 Cushion Natural Diamond

VG • K/SI1 • GIA 1395417930

Certificate GIA 1395417930

Diamond specifications and retailer prices

From $3,800 AUD
As of November 4, 2026
Save $4,460 AUD (54%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $8,260 AUD at MOH London · As of November 4, 2026
View at MOH London

About this 1.31ct natural cushion diamond

This 1.31ct natural cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 1395417930. Listed at 15 retailers as of November 4, 2026, with prices from $3,800 to $8,260, a $4,460 spread on the same certified stone. MOH London lists it at $8,260. 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

1.31
Carat
K
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1395417930
Dimensions6.50 × 6.13 × 4.21 mm
L/W Ratio1.06
Culet sizeNone
Top View
6.50 mm6.13 mm1.31 ctK / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateGIA 1395417930
Side View
Table 67.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 68.6%

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 4
Current: $8,260 AUD|Low: $3,884 AUD|High: $8,382 AUD|Avg: $5,118 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$3,884 AUD
Retailer 5$3,908 AUD
Retailer 6$4,017 AUD
Retailer 9$4,487 AUD
Retailer 7$4,813 AUD
Retailer 8$4,832 AUD
Retailer 2$5,123 AUD
Retailer 3$5,436 AUD
Retailer 4$6,044 AUD
MOH London$8,260 AUD

45 data points across 10 retailers

15 retailers$3,800 AUD to $8,260 AUD

B+
Cheapest Retailer
-
$3,800 AUD
B+
Retailer 2
-
$3,884 AUD
View
B+
Retailer 3
-
$3,908 AUD
View
B+
Retailer 4
-
$3,967 AUD
View
B+
Retailer 5
-
$4,017 AUD
View
B
Retailer 6
-
$4,366 AUD
View
Retailer 7
-
$4,487 AUD
View
Price last confirmed 9 days ago
B
Retailer 8
-
$4,813 AUD
View
B
Retailer 9
-
$4,832 AUD
View
B
Retailer 10
-
$4,873 AUD
View
B
Retailer 11
-
$5,123 AUD
View
B
Retailer 12
-
$5,436 AUD
View
Retailer 13
-
$5,612 AUD
View
Price last confirmed 15 days ago
B
Retailer 14
-
$6,044 AUD
View
Most Expensive
C
MOH London
ABE43FA0F · Nov 4
$8,260 AUD
£4,469 GBP
View
14 more retailers have this diamond
Prices start from $3,800 AUDSave up to $4,460 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+
1.31ct Cushion
$3,800 AUD