CaratHunter
Plans
Heart|Natural|GIA

1.21ct D SI1 Heart Natural Diamond

EX • D/SI1 • GIA 6442853900

Certificate GIA 6442853900

Diamond specifications and retailer prices

From HK$20,761 HKD
As of November 6, 2026
Save HK$23,601 HKD (53%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: HK$44,363 HKD at MOH London · As of November 4, 2026
View at MOH London

About this 1.21ct natural heart diamond

This 1.21ct natural heart sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6442853900. Listed at 20 retailers as of November 4, 2026, with prices from HK$20,761 to HK$44,363, a HK$23,601 spread on the same certified stone. MOH London lists it at HK$44,363. 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
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle44.6°
Pavilion angle53.43°
OriginNatural
Grading LabGIA
CertificateGIA 6442853900
Dimensions5.94 × 5.77 × 4.03 mm
L/W Ratio1.03
Top View
5.94 mm5.77 mm1.21 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6442853900
Side View
Table 65.0%Crown 44.6°Girdle: MED-VTKPavilion 53.43°Culet: NoneDepth 69.8%

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$44,363 HKD|Low: HK$20,761 HKD|High: HK$44,721 HKD|Avg: HK$28,610 HKD|-0.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 2HK$20,761 HKD
Retailer 10HK$20,863 HKD
Retailer 8HK$23,810 HKD
Retailer 11HK$25,769 HKD
Retailer 4HK$25,801 HKD
Retailer 9HK$27,541 HKD
Retailer 6HK$28,975 HKD
Retailer 3HK$30,652 HKD
Retailer 5HK$30,966 HKD
Retailer 7HK$32,463 HKD
MOH LondonHK$44,363 HKD

26 data points across 11 retailers

20 retailersHK$20,761 HKD to HK$44,363 HKD

A
Cheapest Retailer
-
HK$20,761 HKD
A
Retailer 2
-
HK$20,863 HKD
View
B+
Retailer 3
-
HK$23,614 HKD
View
B+
Retailer 4
-
HK$23,810 HKD
View
B+
Retailer 5
-
HK$24,547 HKD
View
Final sale: no returns
B+
Retailer 6
-
HK$25,667 HKD
View
B+
Retailer 7
-
HK$25,769 HKD
View
B+
Retailer 8
-
HK$25,801 HKD
View
Retailer 9
-
HK$26,600 HKD
View
Price last confirmed 9 days ago
B+
Retailer 10
-
HK$26,726 HKD
View
B+
Retailer 11
-
HK$27,541 HKD
View
B+
Retailer 12
-
HK$27,729 HKD
View
B+
Retailer 13
-
HK$28,230 HKD
View
Retailer 14
-
HK$28,411 HKD
View
Price last confirmed 31 days ago
B+
Retailer 15
-
HK$28,975 HKD
View
B+
Retailer 16
-
HK$30,966 HKD
View
B
Retailer 17
-
HK$32,463 HKD
View
B
Retailer 18
-
HK$39,211 HKD
View
B
Retailer 19
-
HK$40,300 HKD
View
Most Expensive
B
MOH London
52F0D1674 · Nov 4
HK$44,363 HKD
£4,457 GBP
View
19 more retailers have this diamond
Prices start from HK$20,761 HKDSave up to HK$23,601 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$20,761 HKD