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Round|Natural|GIA

1.21ct E SI2 Round Natural Diamond

EX • E/SI2 • GIA 2166080674

Certificate GIA 2166080674

Diamond specifications and retailer prices

From $9,428 AUD
As of November 1, 2026
Save $3,566 AUD (27%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $21,095 AUD at Diamond Quarter · As of November 5, 2026
View at Diamond Quarter

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 2166080674. Listed at 9 retailers as of November 1, 2026, with a 38% 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
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2166080674
Dimensions6.85 × 6.82 × 4.23 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.85 mm6.82 mm1.21 ctE / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2166080674
Side View
Table 57.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 61.9%

Caratlytics Score

How it works →
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 1
Current: $12,994 AUD|Low: $9,428 AUD|High: $13,121 AUD|Avg: $11,202 AUD|+2.1%
Retailer 1
Retailer 2
November 5, 2026
Retailer 2$9,428 AUD
Retailer 1$12,994 AUD

24 data points across 2 retailers

9 retailers$9,428 AUD to $12,994 AUD

B
Cheapest Retailer
-
$9,428 AUD
B
Retailer 2
-
$9,550 AUD
View
B
Retailer 3
-
$10,429 AUD
View
B
Retailer 4
-
$12,518 AUD
View
B
Retailer 5
-
$12,571 AUD
View
B
Retailer 6
-
$12,571 AUD
View
B
Retailer 7
-
$12,985 AUD
View
B
Retailer 8
-
$12,994 AUD
View
Most Expensive
Diamond Quarter
1.21SI2E2174BEA0N · Nov 5
$21,095 AUD
£11,628 GBP
View
Price under review
8 more retailers have this diamond
Prices start from $9,428 AUDSave up to $3,566 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 Round
$9,428 AUD