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Round|Natural|GIA

1.21ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2556873938

Certificate GIA 2556873938

Diamond specifications and retailer prices

From $2,755 AUD
As of November 5, 2026
Save $1,812 AUD (40%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $6,466 AUD at Helzberg Diamonds · As of September 27, 2026
View at Helzberg Diamonds

About this 1.21ct natural round diamond

This 1.21ct natural round sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2556873938. Listed at 15 retailers as of November 5, 2026, with a 66% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2556873938
Dimensions6.75 × 6.79 × 4.24 mm
L/W Ratio1.01
Culet sizeNone
Top View
6.75 mm6.79 mm1.21 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556873938
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $3,026 AUD|Low: $2,755 AUD|High: $4,909 AUD|Avg: $3,396 AUD|-7.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 7, 2026
Retailer 14$2,755 AUD
Retailer 7$2,761 AUD
Retailer 9$2,773 AUD
Retailer 11$2,784 AUD
Retailer 12$2,794 AUD
Retailer 8$2,850 AUD
Retailer 1$3,026 AUD
Retailer 5$3,032 AUD
Retailer 3$3,318 AUD
Retailer 10$3,521 AUD
Retailer 4$3,558 AUD
Retailer 6$4,205 AUD
Retailer 13$4,245 AUD
Retailer 2$4,567 AUD

37 data points across 14 retailers

15 retailers$2,755 AUD to $4,567 AUD

A
Cheapest Retailer
-
$2,755 AUD
A
Retailer 2
-
$2,761 AUD
View
A
Retailer 3
-
$2,773 AUD
View
A
Retailer 4
-
$2,784 AUD
View
A
Retailer 5
-
$2,794 AUD
View
A
Retailer 6
-
$2,850 AUD
View
A
Retailer 7
-
$3,026 AUD
View
A
Retailer 8
-
$3,032 AUD
View
B+
Retailer 9
-
$3,318 AUD
View
B+
Retailer 10
-
$3,521 AUD
View
B+
Retailer 11
-
$3,558 AUD
View
B+
Retailer 12
-
$3,640 AUD
View
B+
Retailer 13
-
$4,245 AUD
View
B+
Retailer 14
-
$4,567 AUD
View
Most Expensive
Helzberg Diamonds
XZRILLKOOLOHO · Sep 27
$6,466 AUD
$4,443 USD
View
Price last confirmed 40 days ago
14 more retailers have this diamond
Prices start from $2,755 AUDSave up to $1,812 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.

A
1.21ct Round
$2,755 AUD