Round|Natural|GIA

1.21ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 6431629525

Certificate GIA 6431629525

Diamond specifications and retailer prices

From $2,811 USD
As of November 1, 2026
Save $2,984 USD (51%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $6,037 USD at NZ Jewellers · As of October 17, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6431629525. Listed at 23 retailers as of November 1, 2026, with a 106% 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
I
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6431629525
Dimensions6.84 × 6.80 × 4.23 mm
L/W Ratio1.01
Top View
6.84 mm6.80 mm1.21 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6431629525
Side View
Table 56.0%Crown 35.5°Girdle: MediumPavilion 40.8°Culet: NoneDepth 62.1%

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 1
Current: $5,052 USD|Low: $2,811 USD|High: $5,983 USD|Avg: $3,829 USD|-2.9%
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 3, 2026
Retailer 15$2,811 USD
Retailer 13$2,850 USD
Retailer 16$2,876 USD
Retailer 7$2,959 USD
Retailer 9$3,159 USD
Retailer 4$3,286 USD
Retailer 3$3,435 USD
Retailer 6$3,465 USD
Retailer 17$3,570 USD
Retailer 18$3,570 USD
Retailer 12$3,599 USD
Retailer 5$3,652 USD
Retailer 2$3,690 USD
Retailer 11$3,840 USD
Retailer 8$4,123 USD
Retailer 1$5,052 USD
Retailer 14$5,795 USD
Retailer 10$5,983 USD

22 data points across 18 retailers

23 retailers$2,811 USD to $5,795 USD

A
Cheapest Retailer
-
$2,811 USD
A
Retailer 2
-
$2,850 USD
View
A
Retailer 3
-
$2,876 USD
View
Retailer 4
-
$2,959 USD
View
Price last confirmed 18 days ago
B+
Retailer 5
-
$3,159 USD
View
B+
Retailer 6
-
$3,286 USD
View
B+
Retailer 7
-
$3,435 USD
View
Retailer 8
-
$3,465 USD
View
Price last confirmed 56 days ago
Retailer 9
-
$3,465 USD
View
Price last confirmed 21 days ago
Retailer 10
-
$3,465 USD
View
Price last confirmed 19 days ago
B+
Retailer 11
-
$3,570 USD
View
B+
Retailer 12
-
$3,570 USD
View
Retailer 13
-
$3,598 USD
View
Price last confirmed 22 days ago
B+
Retailer 14
-
$3,599 USD
View
B+
Retailer 15
-
$3,652 USD
View
B
Retailer 16
-
$3,690 USD
View
B
Retailer 17
-
$3,840 USD
View
Retailer 18
-
$3,998 USD
View
Price last confirmed 60 days ago
Retailer 19
-
$3,998 USD
View
Price last confirmed 19 days ago
B
Retailer 20
-
$5,052 USD
View
B
Retailer 21
-
$5,795 USD
View
Retailer 22
-
$6,037 USD
View
Price last confirmed 57 days ago
Most Expensive
NZ Jewellers
ed3d6f6b-3ec0-4861-8c13-5b12bee53f86 · Oct 17
$6,037 USD
View
Price last confirmed 20 days ago
22 more retailers have this diamond
Prices start from $2,811 USDSave up to $2,984 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
$2,811 USD