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Round|Natural|GIA

1.21ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 1568139211

Certificate GIA 1568139211

Diamond specifications and retailer prices

From HK$17,739 HKD
$2,261 USD
As of October 31, 2026
Save HK$7,527 HKD (30%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: HK$37,040 HKD at NZ Jewellers · As of October 3, 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 J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1568139211. Listed at 14 retailers as of October 31, 2026, with a 42% 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
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 1568139211
Dimensions6.79 × 6.75 × 4.25 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Needle
Top View
6.79 mm6.75 mm1.21 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1568139211
Side View
Table 58.0%Crown 35°Girdle: Slightly ThickPavilion 41.4°Culet: NDepth 62.8%

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: Oct 31
Current: HK$20,855 HKD|Low: HK$15,048 HKD|High: HK$31,417 HKD|Avg: HK$19,586 HKD|+23.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 10HK$16,633 HKD
Retailer 8HK$17,739 HKD
Retailer 2HK$17,815 HKD
Retailer 3HK$18,045 HKD
Retailer 7HK$18,940 HKD
Retailer 1HK$20,855 HKD
Retailer 9HK$22,517 HKD
Retailer 5HK$23,034 HKD
Retailer 4HK$23,302 HKD
Retailer 6HK$25,266 HKD
Retailer 11HK$29,175 HKD

34 data points across 11 retailers

14 retailersHK$17,739 HKD to HK$25,266 HKD

Retailer 1
-
HK$16,633 HKD
$2,120 USD
Price last confirmed 9 days ago
Retailer 2
-
HK$17,716 HKD
$2,258 USD
View
Price last confirmed 29 days ago
B+
Retailer 3
-
HK$17,739 HKD
$2,261 USD
View
Retailer 4
-
HK$17,815 HKD
$2,271 USD
View
Price last confirmed 14 days ago
Retailer 5
-
HK$18,186 HKD
$2,318 USD
View
Price last confirmed 33 days ago
B+
Retailer 6
-
HK$18,940 HKD
$2,414 USD
View
Retailer 7
-
HK$20,446 HKD
$2,606 USD
View
Price last confirmed 29 days ago
B
Retailer 8
-
HK$20,855 HKD
£2,093 GBP
View
B
Retailer 9
-
HK$22,517 HKD
$2,870 USD
View
B
Retailer 10
-
HK$23,034 HKD
£2,312 GBP
View
B
Retailer 11
-
HK$23,302 HKD
$2,970 USD
View
B
Retailer 12
-
HK$25,266 HKD
€3,067 EUR
View
Retailer 13
-
HK$29,175 HKD
£2,928 GBP
View
Price last confirmed 12 days ago
Most Expensive
NZ Jewellers
a97379d0-ccd1-40c8-a18a-99acab17243b · Oct 3
HK$37,040 HKD
$4,721 USD
View
Price last confirmed 30 days ago
13 more retailers have this diamond
Prices start from HK$17,739 HKDSave up to HK$7,527 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.

B+
1.21ct Round
HK$17,739 HKD