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Round|Natural|GIA

1.21ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2243122857

Certificate GIA 2243122857

Diamond specifications and retailer prices

From HK$17,164 HKD
As of November 6, 2026
Save HK$13,849 HKD (45%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: HK$31,013 HKD at Helzberg Diamonds · As of November 6, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2243122857. Listed at 12 retailers as of November 6, 2026, with prices from HK$17,164 to HK$31,013, a HK$13,849 spread on the same certified stone. Helzberg Diamonds lists it at HK$31,013. 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
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle34°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 2243122857
Dimensions6.81 × 6.83 × 4.25 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.81 mm6.83 mm1.21 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2243122857
Side View
Table 56.0%Crown 34°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.3%

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 6
Current: HK$31,013 HKD|Low: HK$17,164 HKD|High: HK$31,013 HKD|Avg: HK$22,414 HKD
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 7, 2026
Retailer 5HK$17,164 HKD
Retailer 2HK$18,410 HKD
Retailer 3HK$18,747 HKD
Retailer 11HK$18,841 HKD
Retailer 8HK$19,437 HKD
Retailer 6HK$21,545 HKD
Retailer 10HK$21,569 HKD
Retailer 7HK$21,710 HKD
Retailer 9HK$22,109 HKD
Retailer 12HK$26,381 HKD
Retailer 4HK$28,207 HKD
Helzberg DiamondsHK$31,013 HKD

4 data points across 12 retailers

12 retailersHK$17,164 HKD to HK$31,013 HKD

A
Cheapest Retailer
-
HK$17,164 HKD
B+
Retailer 2
-
HK$18,410 HKD
View
B+
Retailer 3
-
HK$18,747 HKD
View
B+
Retailer 4
-
HK$18,841 HKD
View
B+
Retailer 5
-
HK$19,437 HKD
View
B
Retailer 6
-
HK$21,545 HKD
View
B
Retailer 7
-
HK$21,569 HKD
View
B+
Retailer 8
-
HK$21,710 HKD
View
B
Retailer 9
-
HK$22,109 HKD
View
B
Retailer 10
-
HK$26,381 HKD
View
B
Retailer 11
-
HK$28,207 HKD
View
Most Expensive
B
Helzberg Diamonds
XZRIIKJHIIOLN · Nov 6
HK$31,013 HKD
$3,957 USD
View
11 more retailers have this diamond
Prices start from HK$17,164 HKDSave up to HK$13,849 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$17,164 HKD