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Cushion|Natural|GIA

1.21ct G SI1 Cushion Natural Diamond

EX • G/SI1 • GIA 5136915906

Certificate GIA 5136915906

Diamond specifications and retailer prices

From $6,445 AUD
As of November 4, 2026
Save $5,263 AUD (45%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $11,707 AUD at MOH London · As of November 7, 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5136915906. Listed at 9 retailers as of November 4, 2026, with prices from $6,445 to $11,707, a $5,263 spread on the same certified stone. MOH London lists it at $11,707. 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5136915906
Dimensions5.85 × 5.75 × 3.76 mm
L/W Ratio1.02
Top View
5.85 mm5.75 mm1.21 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryGood
FluorescenceNone
CertificateGIA 5136915906
Side View
Table 61.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 65.4%

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 4
Current: $11,707 AUD|Low: $6,411 AUD|High: $11,913 AUD|Avg: $8,016 AUD|+1.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 9$6,445 AUD
Retailer 5$6,498 AUD
Retailer 7$6,648 AUD
Retailer 8$7,391 AUD
Retailer 6$7,450 AUD
Retailer 2$8,047 AUD
Retailer 3$8,316 AUD
Retailer 4$9,016 AUD
MOH London$11,707 AUD

43 data points across 9 retailers

9 retailers$6,445 AUD to $11,707 AUD

B
Cheapest Retailer
-
$6,445 AUD
B
Retailer 2
-
$6,498 AUD
View
B
Retailer 3
-
$6,648 AUD
View
Retailer 4
-
$7,391 AUD
View
Price last confirmed 9 days ago
Retailer 5
-
$7,450 AUD
View
Price last confirmed 29 days ago
B
Retailer 6
-
$8,047 AUD
View
B
Retailer 7
-
$8,316 AUD
View
B
Retailer 8
-
$9,016 AUD
View
Most Expensive
B
MOH London
FC016585B · Nov 7
$11,707 AUD
£6,334 GBP
View
8 more retailers have this diamond
Prices start from $6,445 AUDSave up to $5,263 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
$6,445 AUD