Round|Natural|GIA

1.21ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 3515861632

Certificate GIA 3515861632

Diamond specifications and retailer prices

From $6,188 AUD
As of November 5, 2026
Save $1,073 AUD (15%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $11,779 AUD 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 3515861632. Listed at 19 retailers as of November 2, 2026, with a relatively tight 17% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle33.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 3515861632
Dimensions6.95 × 6.92 × 4.16 mm
L/W Ratio1.00
Star length50%
Lower girdle75%
Top View
6.95 mm6.92 mm1.21 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 3515861632
Side View
Table 59.0%Crown 33.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 60.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $7,261 AUD|Low: $5,389 AUD|High: $10,897 AUD|Avg: $6,945 AUD|-1.3%
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 2, 2026
Retailer 13$5,389 AUD
Retailer 14$5,472 AUD
Retailer 11$5,480 AUD
Retailer 8$5,822 AUD
Retailer 6$6,098 AUD
Retailer 2$6,188 AUD
Retailer 3$6,426 AUD
Retailer 9$6,542 AUD
Retailer 7$6,679 AUD
Retailer 5$6,814 AUD
Retailer 4$7,140 AUD
Retailer 1$7,261 AUD
Retailer 12$8,232 AUD
Retailer 10$10,825 AUD

35 data points across 14 retailers

19 retailers$6,188 AUD to $7,261 AUD

Retailer 1
-
$5,389 AUD
Price last confirmed 8 days ago
Retailer 2
-
$5,472 AUD
View
Price last confirmed 9 days ago
Retailer 3
-
$5,480 AUD
View
Price last confirmed 10 days ago
Retailer 4
-
$5,822 AUD
View
Price last confirmed 9 days ago
Retailer 5
-
$6,098 AUD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$6,188 AUD
View
B
Retailer 7
-
$6,426 AUD
View
Retailer 8
-
$6,542 AUD
View
Price last confirmed 9 days ago
Retailer 9
-
$6,679 AUD
View
Price last confirmed 8 days ago
Retailer 10
-
$6,760 AUD
View
Price last confirmed 20 days ago
Retailer 11
-
$6,760 AUD
View
Price last confirmed 22 days ago
Retailer 12
-
$6,760 AUD
View
Price last confirmed 23 days ago
Retailer 13
-
$6,814 AUD
View
Price last confirmed 29 days ago
B
Retailer 14
-
$7,140 AUD
View
B
Retailer 15
-
$7,261 AUD
View
Retailer 16
-
$7,801 AUD
View
Price last confirmed 20 days ago
Retailer 17
-
$8,232 AUD
View
Price last confirmed 11 days ago
Retailer 18
-
$10,825 AUD
View
Price last confirmed 9 days ago
Most Expensive
NZ Jewellers
cc76e0f9-6f19-4815-a1d1-7f9994dc5d3b · Oct 17
$11,779 AUD
$8,093 USD
View
Price last confirmed 20 days ago
18 more retailers have this diamond
Prices start from $6,188 AUDSave up to $1,073 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
$6,188 AUD