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Heart|Natural|GIA

1.21ct I SI1 Heart Natural Diamond

EX • I/SI1 • GIA 5241078543

Certificate GIA 5241078543

Diamond specifications and retailer prices

From HK$14,844 HKD
As of November 6, 2026
Save HK$19,562 HKD (57%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: HK$41,397 HKD at NZ Jewellers · As of October 18, 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 I 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 5241078543. Listed at 16 retailers as of November 4, 2026, with a 132% 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5241078543
Dimensions6.53 × 7.44 × 4.31 mm
L/W Ratio1.14
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
6.53 mm7.44 mm1.21 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5241078543
Side View
Table 59.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 57.9%

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$19,100 HKD|Low: HK$14,742 HKD|High: HK$35,104 HKD|Avg: HK$20,971 HKD|-2.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 11HK$14,844 HKD
Retailer 7HK$17,352 HKD
Retailer 10HK$18,167 HKD
Retailer 3HK$18,457 HKD
Retailer 1HK$19,100 HKD
Retailer 4HK$20,573 HKD
Retailer 9HK$20,785 HKD
Retailer 5HK$20,832 HKD
Retailer 2HK$22,180 HKD
Retailer 6HK$24,029 HKD
Retailer 8HK$34,406 HKD

43 data points across 11 retailers

16 retailersHK$14,844 HKD to HK$34,406 HKD

A
Cheapest Retailer
-
HK$14,844 HKD
B+
Retailer 2
-
HK$17,352 HKD
View
B+
Retailer 3
-
HK$18,167 HKD
View
Final sale: no returns
B+
Retailer 4
-
HK$18,457 HKD
View
B+
Retailer 5
-
HK$19,100 HKD
View
Retailer 6
-
HK$19,805 HKD
View
Price last confirmed 20 days ago
Retailer 7
-
HK$19,805 HKD
View
Price last confirmed 22 days ago
B+
Retailer 8
-
HK$20,573 HKD
View
Retailer 9
-
HK$20,714 HKD
View
Price last confirmed 22 days ago
B+
Retailer 10
-
HK$20,785 HKD
View
B+
Retailer 11
-
HK$20,832 HKD
View
Retailer 12
-
HK$22,180 HKD
View
Price last confirmed 31 days ago
Retailer 13
-
HK$22,846 HKD
View
Price last confirmed 19 days ago
B+
Retailer 14
-
HK$24,029 HKD
View
B
Retailer 15
-
HK$34,406 HKD
View
Most Expensive
NZ Jewellers
b8ff14db-c968-4b36-b67a-db21493df5da · Oct 18
HK$41,397 HKD
$5,282 USD
View
Price last confirmed 19 days ago
15 more retailers have this diamond
Prices start from HK$14,844 HKDSave up to HK$19,562 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 Heart
HK$14,844 HKD