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Round|Natural|GIA

1.21ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1563314290

Certificate GIA 1563314290

Diamond specifications and retailer prices

From HK$23,645 HKD
As of October 31, 2026
Save HK$21,333 HKD (47%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: HK$44,979 HKD at Helzberg Diamonds · As of November 1, 2026
View at Helzberg Diamonds

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 1563314290. Listed at 15 retailers as of October 31, 2026, with prices from HK$23,645 to HK$44,979, a HK$21,333 spread on the same certified stone. Helzberg Diamonds lists it at HK$44,979. 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
FluorescenceNone
Crown angle33°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 1563314290
Dimensions6.85 × 6.89 × 4.20 mm
L/W Ratio1.01
Culet sizeNone
Top View
6.85 mm6.89 mm1.21 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1563314290
Side View
Table 58.0%Crown 33°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 61.2%

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: Oct 31
Current: HK$44,979 HKD|Low: HK$23,645 HKD|High: HK$46,687 HKD|Avg: HK$31,973 HKD|-3.7%
Helzberg Diamonds
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
November 2, 2026
Retailer 12HK$23,645 HKD
Retailer 8HK$25,001 HKD
Retailer 14HK$25,174 HKD
Retailer 4HK$25,487 HKD
Retailer 11HK$25,785 HKD
Retailer 2HK$27,682 HKD
Retailer 3HK$28,450 HKD
Retailer 6HK$28,481 HKD
Retailer 13HK$30,260 HKD
Retailer 5HK$30,809 HKD
Retailer 9HK$31,483 HKD
Retailer 16HK$32,541 HKD
Retailer 10HK$32,807 HKD
Retailer 15HK$39,885 HKD
Retailer 7HK$43,262 HKD
Helzberg DiamondsHK$44,979 HKD

34 data points across 16 retailers

15 retailersHK$23,645 HKD to HK$44,979 HKD

A
Cheapest Retailer
-
HK$23,645 HKD
B+
Retailer 2
-
HK$25,174 HKD
View
B+
Retailer 3
-
HK$25,487 HKD
View
B+
Retailer 4
-
HK$25,785 HKD
View
B+
Retailer 5
-
HK$27,682 HKD
View
B+
Retailer 6
-
HK$28,450 HKD
View
B+
Retailer 7
-
HK$28,481 HKD
View
B+
Retailer 8
-
HK$30,260 HKD
View
B+
Retailer 9
-
HK$30,809 HKD
View
B+
Retailer 10
-
HK$31,483 HKD
View
B+
Retailer 11
-
HK$32,541 HKD
View
B+
Retailer 12
-
HK$32,807 HKD
View
B
Retailer 13
-
HK$39,885 HKD
View
Retailer 14
-
HK$43,262 HKD
View
Price last confirmed 17 days ago
Most Expensive
B
Helzberg Diamonds
XZRHLMJJHKIPG · Nov 1
HK$44,979 HKD
$5,739 USD
View
14 more retailers have this diamond
Prices start from HK$23,645 HKDSave up to HK$21,333 HKD

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
HK$23,645 HKD