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Heart|Natural|IGI

1.21ct I SI1 Heart Natural Diamond

VG • I/SI1 • IGI 726507508

Shape and cutting style on the report: Heart brilliant

Certificate IGI 726507508

Diamond specifications and retailer prices

From HK$14,711 HKD
As of November 5, 2026
Save HK$19,327 HKD (57%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: HK$34,038 HKD at NZ Jewellers · As of September 20, 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 very-good cut grade and certified by IGI 726507508. Listed at 13 retailers as of November 5, 2026, with a 131% 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
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle38.6°
Pavilion angle38.7°
OriginNatural
Grading LabIGI
CertificateIGI 726507508
Dimensions6.46 × 7.29 × 4.28 mm
L/W Ratio1.13
Girdle conditionFaceted
Culet sizePointed
Top View
6.46 mm7.29 mm1.21 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateIGI 726507508
Side View
Table 58.0%Crown 38.6°Girdle: MED-STKPavilion 38.7°Culet: NoneDepth 58.7%

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 5
Current: HK$17,987 HKD|Low: HK$14,711 HKD|High: HK$28,865 HKD|Avg: HK$18,508 HKD|+3.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 4HK$14,711 HKD
Retailer 6HK$15,832 HKD
Retailer 7HK$16,278 HKD
Retailer 5HK$16,498 HKD
Retailer 1HK$17,987 HKD
Retailer 2HK$19,868 HKD
Retailer 3HK$28,442 HKD

42 data points across 7 retailers

13 retailersHK$14,711 HKD to HK$34,038 HKD

A
Cheapest Retailer
-
HK$14,711 HKD
Retailer 2
-
HK$16,278 HKD
View
Price last confirmed 46 days ago
B+
Retailer 3
-
HK$16,278 HKD
View
Retailer 4
-
HK$16,278 HKD
View
Price last confirmed 9 days ago
B+
Retailer 5
-
HK$16,498 HKD
View
B+
Retailer 6
-
HK$17,031 HKD
View
B+
Retailer 7
-
HK$17,987 HKD
View
Retailer 8
-
HK$18,786 HKD
View
Price last confirmed 44 days ago
B+
Retailer 9
-
HK$18,786 HKD
View
B+
Retailer 10
-
HK$19,868 HKD
View
B
Retailer 11
-
HK$28,442 HKD
View
C
Retailer 12
-
HK$34,038 HKD
View
Most Expensive
NZ Jewellers
2a16426c-cd62-4a91-b4ed-b2e3d80f3e91 · Sep 20
HK$34,038 HKD
$4,343 USD
View
Price last confirmed 47 days ago
12 more retailers have this diamond
Prices start from HK$14,711 HKDSave up to HK$19,327 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$14,711 HKD