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Round|Natural|GIA

1.21ct J SI1 Round Natural Diamond

VG • J/SI1 • GIA 2457091274

Certificate GIA 2457091274

Diamond specifications and retailer prices

From HK$17,352 HKD
As of November 6, 2026
Save HK$19,343 HKD (53%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: HK$43,905 HKD at NZ Jewellers · As of September 28, 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 SI1 clarity (slightly-included), with a very-good cut grade and certified by GIA 2457091274. Listed at 16 retailers as of November 4, 2026, with a 111% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
J
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2457091274
Dimensions6.69 × 6.64 × 4.27 mm
L/W Ratio1.01
Top View
6.69 mm6.64 mm1.21 ctJ / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2457091274
Side View
Table 56.0%CrownGirdle: ThickPavilionCulet: NoneDepth 64.1%

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 6
Current: HK$22,031 HKD|Low: HK$17,148 HKD|High: HK$37,235 HKD|Avg: HK$23,566 HKD|+2.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 5HK$17,352 HKD
Retailer 6HK$18,810 HKD
Retailer 7HK$19,382 HKD
Retailer 9HK$20,691 HKD
Retailer 1HK$22,031 HKD
Retailer 8HK$23,528 HKD
Retailer 3HK$25,628 HKD
Retailer 2HK$26,075 HKD
Retailer 4HK$36,695 HKD

42 data points across 9 retailers

16 retailersHK$17,352 HKD to HK$36,695 HKD

B+
Cheapest Retailer
-
HK$17,352 HKD
B+
Retailer 2
-
HK$18,810 HKD
View
B+
Retailer 3
-
HK$19,382 HKD
View
Final sale: no returns
B
Retailer 4
-
HK$20,691 HKD
View
Retailer 5
-
HK$21,004 HKD
View
Price last confirmed 30 days ago
Retailer 6
-
HK$21,004 HKD
View
Price last confirmed 30 days ago
Retailer 7
-
HK$21,811 HKD
View
Price last confirmed 39 days ago
B
Retailer 8
-
HK$22,031 HKD
View
B
Retailer 9
-
HK$22,101 HKD
View
B
Retailer 10
-
HK$22,415 HKD
View
Retailer 11
-
HK$23,528 HKD
View
Price last confirmed 31 days ago
Retailer 12
-
HK$24,233 HKD
View
Price last confirmed 39 days ago
B
Retailer 13
-
HK$25,628 HKD
View
B
Retailer 14
-
HK$26,075 HKD
View
B
Retailer 15
-
HK$36,695 HKD
View
Most Expensive
NZ Jewellers
824644bc-4f19-464d-8bcb-18b453c455d6 · Sep 28
HK$43,905 HKD
$5,602 USD
View
Price last confirmed 39 days ago
15 more retailers have this diamond
Prices start from HK$17,352 HKDSave up to HK$19,343 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$17,352 HKD