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Heart|Natural|GIA

1.21ct J SI1 Heart Natural Diamond

EX • J/SI1 • GIA 2508189179

Certificate GIA 2508189179

Diamond specifications and retailer prices

From HK$15,643 HKD
As of November 6, 2026
Save HK$28,207 HKD (64%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: HK$43,850 HKD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.21ct natural heart diamond

This 1.21ct natural heart sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2508189179. Listed at 20 retailers as of November 5, 2026, with prices from HK$15,643 to HK$43,850, a HK$28,207 spread on the same certified stone. NZ Jewellers lists it at HK$43,850. 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2508189179
Dimensions6.69 × 7.23 × 4.20 mm
L/W Ratio1.08
Top View
6.69 mm7.23 mm1.21 ctJ / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 2508189179
Side View
Table 56.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 58.1%

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$43,850 HKD|Low: HK$15,448 HKD|High: HK$43,850 HKD|Avg: HK$23,858 HKD
NZ Jewellers
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
Retailer 17
Retailer 18
November 6, 2026
Retailer 15HK$15,643 HKD
Retailer 16HK$18,512 HKD
Retailer 5HK$18,786 HKD
Retailer 17HK$19,358 HKD
Retailer 3HK$20,652 HKD
Retailer 6HK$20,699 HKD
Retailer 7HK$20,973 HKD
Retailer 11HK$21,717 HKD
Retailer 4HK$21,780 HKD
Retailer 10HK$22,078 HKD
Retailer 12HK$22,196 HKD
Retailer 8HK$23,175 HKD
Retailer 18HK$23,497 HKD
Retailer 9HK$24,014 HKD
Retailer 13HK$25,597 HKD
Retailer 2HK$26,044 HKD
Retailer 14HK$36,648 HKD
NZ JewellersHK$43,850 HKD

43 data points across 18 retailers

20 retailersHK$15,643 HKD to HK$43,850 HKD

B+
Cheapest Retailer
-
HK$15,643 HKD
B+
Retailer 2
-
HK$18,512 HKD
View
B+
Retailer 3
-
HK$18,786 HKD
View
B
Retailer 4
-
HK$19,358 HKD
View
Final sale: no returns
B+
Retailer 5
-
HK$20,315 HKD
View
B+
Retailer 6
-
HK$20,652 HKD
View
Retailer 7
-
HK$20,973 HKD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
HK$20,973 HKD
View
B
Retailer 9
-
HK$21,717 HKD
View
B
Retailer 10
-
HK$21,780 HKD
View
B
Retailer 11
-
HK$22,078 HKD
View
B+
Retailer 12
-
HK$22,196 HKD
View
B
Retailer 13
-
HK$23,175 HKD
View
Retailer 14
-
HK$23,497 HKD
View
Price last confirmed 31 days ago
B
Retailer 15
-
HK$24,014 HKD
View
B
Retailer 16
-
HK$24,202 HKD
View
B
Retailer 17
-
HK$25,597 HKD
View
B
Retailer 18
-
HK$26,044 HKD
View
B
Retailer 19
-
HK$36,648 HKD
View
Most Expensive
B
NZ Jewellers
f3b42846-f509-4876-a79d-a14152981848 · Nov 5
HK$43,850 HKD
$5,595 USD
View
19 more retailers have this diamond
Prices start from HK$15,643 HKDSave up to HK$28,207 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 Heart
HK$15,643 HKD