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Cushion|Natural|GIA

1.21ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 7191728315

Certificate GIA 7191728315

Diamond specifications and retailer prices

From $4,055 AUD
As of November 4, 2026
Save $4,775 AUD (54%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $8,830 AUD at MOH London · As of November 2, 2026
View at MOH London

About this 1.21ct natural cushion diamond

This 1.21ct natural cushion sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7191728315. Listed at 15 retailers as of November 2, 2026, with prices from $4,055 to $8,830, a $4,775 spread on the same certified stone. MOH London lists it at $8,830. 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

1.21
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 7191728315
Dimensions6.72 × 5.63 × 3.86 mm
L/W Ratio1.19
Top View
6.72 mm5.63 mm1.21 ctK / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateGIA 7191728315
Side View
Table 61.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 68.6%

Caratlytics Score

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

Price History

Last verified: Nov 4
Current: $8,830 AUD|Low: $4,116 AUD|High: $8,937 AUD|Avg: $5,618 AUD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 7, 2026
Retailer 8$4,116 AUD
Retailer 5$4,162 AUD
Retailer 7$4,784 AUD
Retailer 6$5,136 AUD
Retailer 2$5,464 AUD
Retailer 3$5,800 AUD
Retailer 4$6,445 AUD
MOH London$8,830 AUD

45 data points across 8 retailers

15 retailers$4,055 AUD to $8,830 AUD

B
Cheapest Retailer
-
$4,055 AUD
B
Retailer 2
-
$4,116 AUD
View
B
Retailer 3
-
$4,162 AUD
View
B
Retailer 4
-
$4,229 AUD
View
B
Retailer 5
-
$4,245 AUD
View
B
Retailer 6
-
$4,534 AUD
View
B
Retailer 7
-
$4,628 AUD
View
Retailer 8
-
$4,784 AUD
View
Price last confirmed 9 days ago
B
Retailer 9
-
$5,136 AUD
View
B
Retailer 10
-
$5,199 AUD
View
B
Retailer 11
-
$5,464 AUD
View
B
Retailer 12
-
$5,800 AUD
View
Retailer 13
-
$5,980 AUD
View
Price last confirmed 15 days ago
B
Retailer 14
-
$6,445 AUD
View
Most Expensive
B
MOH London
7F28ECEFC · Nov 2
$8,830 AUD
£4,777 GBP
View
14 more retailers have this diamond
Prices start from $4,055 AUDSave up to $4,775 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
1.21ct Cushion
$4,055 AUD