Round|Natural|GIA

1.21ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 1559331104

Certificate GIA 1559331104

Diamond specifications and retailer prices

From HK$18,100 HKD
$2,307 USD
As of October 31, 2026
Save HK$11,277 HKD (38%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: HK$29,377 HKD at Yorxs · As of November 1, 2026
View at Yorxs

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 1559331104. Listed at 12 retailers as of October 31, 2026, with prices from HK$18,100 to HK$29,377, a HK$11,277 spread on the same certified stone. Yorxs lists it at HK$29,377. 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 angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1559331104
Dimensions6.77 × 6.80 × 4.26 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.77 mm6.80 mm1.21 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1559331104
Side View
Table 57.0%Crown 36.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.7%

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$18,135 HKD|Low: HK$13,771 HKD|High: HK$29,377 HKD|Avg: HK$17,874 HKD|-5.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Yorxs
November 1, 2026
Retailer 12HK$13,771 HKD
Retailer 3HK$14,005 HKD
Retailer 11HK$14,126 HKD
Retailer 9HK$14,885 HKD
Retailer 10HK$14,993 HKD
Retailer 8HK$15,078 HKD
Retailer 5HK$16,570 HKD
Retailer 7HK$17,967 HKD
Retailer 4HK$18,076 HKD
Retailer 1HK$18,135 HKD
Retailer 2HK$23,100 HKD
Retailer 6HK$24,808 HKD
YorxsHK$29,377 HKD

34 data points across 13 retailers

12 retailersHK$18,100 HKD to HK$29,377 HKD

Retailer 1
-
HK$13,771 HKD
SGD 2,372 SGD
Price last confirmed 10 days ago
Retailer 2
-
HK$14,005 HKD
$1,785 USD
View
Price last confirmed 12 days ago
Retailer 3
-
HK$14,126 HKD
$1,801 USD
View
Price last confirmed 15 days ago
Retailer 4
-
HK$14,885 HKD
£1,494 GBP
View
Price last confirmed 13 days ago
Retailer 5
-
HK$14,993 HKD
$1,911 USD
View
Price last confirmed 13 days ago
Retailer 6
-
HK$15,078 HKD
SGD 2,597 SGD
View
Price last confirmed 13 days ago
Retailer 7
-
HK$16,570 HKD
$2,112 USD
View
Price last confirmed 13 days ago
B+
Retailer 8
-
HK$18,100 HKD
$2,307 USD
View
Retailer 9
-
HK$18,135 HKD
£1,820 GBP
View
Price last confirmed 12 days ago
Retailer 10
-
HK$23,100 HKD
$2,944 USD
View
Price last confirmed 13 days ago
Retailer 11
-
HK$24,808 HKD
$3,162 USD
View
Price last confirmed 13 days ago
Most Expensive
B
Yorxs
E25410B · Nov 1
HK$29,377 HKD
€3,566 EUR
View
11 more retailers have this diamond
Prices start from HK$18,100 HKDSave up to HK$11,277 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$18,100 HKD