CaratHunter
Plans
Round|Natural|GIA

1.21ct E SI2 Round Natural Diamond

EX • E/SI2 • GIA 2557157855

Certificate GIA 2557157855

Diamond specifications and retailer prices

From $4,918 AUD
As of November 5, 2026
Save $4,881 AUD (50%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $10,748 AUD at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1.21ct natural round diamond

This 1.21ct natural round sits in the classic one-carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2557157855. Listed at 14 retailers as of November 4, 2026, with a 99% 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
E
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2557157855
Dimensions6.80 × 6.82 × 4.22 mm
L/W Ratio1.00
Star length50%
Top View
6.80 mm6.82 mm1.21 ctE / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2557157855
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.9%

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: $5,415 AUD|Low: $4,918 AUD|High: $9,945 AUD|Avg: $6,807 AUD|-0.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 5$4,918 AUD
Retailer 1$5,415 AUD
Retailer 2$6,210 AUD
Retailer 3$6,521 AUD
Retailer 6$6,978 AUD
Retailer 4$9,800 AUD

32 data points across 6 retailers

14 retailers$4,918 AUD to $9,800 AUD

A
Cheapest Retailer
-
$4,918 AUD
A
Retailer 2
-
$5,415 AUD
View
Retailer 3
-
$5,590 AUD
View
Price last confirmed 28 days ago
Retailer 4
-
$5,590 AUD
View
Price last confirmed 29 days ago
Retailer 5
-
$5,590 AUD
View
Price last confirmed 38 days ago
B+
Retailer 6
-
$6,210 AUD
View
B+
Retailer 7
-
$6,314 AUD
View
B+
Retailer 8
-
$6,314 AUD
View
Retailer 9
-
$6,450 AUD
View
Price last confirmed 28 days ago
B+
Retailer 10
-
$6,514 AUD
View
B+
Retailer 11
-
$6,521 AUD
View
Retailer 12
-
$6,978 AUD
View
Price last confirmed 14 days ago
B
Retailer 13
-
$9,800 AUD
View
Most Expensive
NZ Jewellers
c50702df-7f2f-4dee-9107-310b0574e00e · Sep 28
$10,748 AUD
$7,524 USD
View
Price last confirmed 39 days ago
13 more retailers have this diamond
Prices start from $4,918 AUDSave up to $4,881 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
$4,918 AUD