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Radiant|Natural|GIA

1.21ct K SI1 Radiant Natural Diamond

VG • K/SI1 • GIA 6375192673

Certificate GIA 6375192673

Diamond specifications and retailer prices

From $3,604 AUD
As of November 4, 2026
Save $4,233 AUD (54%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $7,837 AUD at MOH London · As of November 4, 2026
View at MOH London

About this 1.21ct natural radiant diamond

This 1.21ct natural radiant sits in the classic one-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 6375192673. Listed at 10 retailers as of November 4, 2026, with prices from $3,604 to $7,837, a $4,233 spread on the same certified stone. MOH London lists it at $7,837. 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

1.21
Carat
K
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6375192673
Dimensions6.36 × 5.19 × 3.64 mm
L/W Ratio1.23
Top View
6.36 mm5.19 mm1.21 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6375192673
Side View
Table 65.0%CrownGirdle: VTK-ETKPavilionCulet: NoneDepth 70.0%

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: $7,837 AUD|Low: $3,604 AUD|High: $7,952 AUD|Avg: $4,872 AUD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 7, 2026
Retailer 7$3,604 AUD
Retailer 6$3,740 AUD
Retailer 4$3,871 AUD
Retailer 5$4,596 AUD
Retailer 2$4,861 AUD
Retailer 3$5,471 AUD
MOH London$7,837 AUD

43 data points across 7 retailers

10 retailers$3,604 AUD to $7,837 AUD

B
Cheapest Retailer
-
$3,604 AUD
B
Retailer 2
-
$3,740 AUD
View
B
Retailer 3
-
$3,765 AUD
View
B
Retailer 4
-
$3,854 AUD
View
Retailer 5
-
$3,871 AUD
View
Price last confirmed 10 days ago
B
Retailer 6
-
$4,596 AUD
View
B
Retailer 7
-
$4,861 AUD
View
Retailer 8
-
$5,450 AUD
View
Price last confirmed 15 days ago
B
Retailer 9
-
$5,471 AUD
View
Most Expensive
B
MOH London
A7140E27C · Nov 4
$7,837 AUD
£4,240 GBP
View
9 more retailers have this diamond
Prices start from $3,604 AUDSave up to $4,233 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 Radiant
$3,604 AUD