Round|Natural|GIA

1.21ct E SI2 Round Natural Diamond

EX • E/SI2 • GIA 2557157855

Certificate GIA 2557157855

Diamond specifications and retailer prices

From $3,443 USD
As of October 30, 2026
Save $3,472 USD (50%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $7,524 USD 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 October 29, 2026, with a 101% 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $3,823 USD|Low: $3,352 USD|High: $6,962 USD|Avg: $4,562 USD|+0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 3$3,352 USD
Retailer 7$3,443 USD
Retailer 1$3,823 USD
Retailer 5$4,391 USD
Retailer 10$4,420 USD
Retailer 11$4,420 USD
Retailer 2$4,560 USD
Retailer 4$4,622 USD
Retailer 8$4,885 USD
Retailer 9$5,139 USD
Retailer 6$6,915 USD

31 data points across 11 retailers

14 retailers$3,443 USD to $6,915 USD

A
Cheapest Retailer
-
$3,443 USD
B+
Retailer 2
-
$3,823 USD
£3,010 GBP
View
Retailer 3
-
$3,913 USD
View
Price last confirmed 22 days ago
Retailer 4
-
$3,913 USD
View
Price last confirmed 23 days ago
Retailer 5
-
$3,913 USD
View
Price last confirmed 31 days ago
B+
Retailer 6
-
$4,391 USD
£3,457 GBP
View
B+
Retailer 7
-
$4,420 USD
View
B+
Retailer 8
-
$4,420 USD
View
Retailer 9
-
$4,515 USD
View
Price last confirmed 21 days ago
B+
Retailer 10
-
$4,560 USD
View
B+
Retailer 11
-
$4,622 USD
€4,402 EUR
View
Retailer 12
-
$4,885 USD
View
Price last confirmed 7 days ago
B
Retailer 13
-
$6,915 USD
£5,445 GBP
View
Most Expensive
NZ Jewellers
c50702df-7f2f-4dee-9107-310b0574e00e · Sep 28
$7,524 USD
View
Price last confirmed 33 days ago
13 more retailers have this diamond
Prices start from $3,443 USDSave up to $3,472 USD

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
$3,443 USD