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Heart|Natural|GIA

1.51ct I SI2 Heart Natural Diamond

EX • I/SI2 • GIA 6552596091

Certificate GIA 6552596091

Diamond specifications and retailer prices

From HK$22,368 HKD
As of November 6, 2026
Save HK$26,961 HKD (55%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: HK$51,891 HKD at NZ Jewellers · As of October 18, 2026
View at NZ Jewellers

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6552596091. Listed at 13 retailers as of November 4, 2026, with a 121% 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

1.51
Carat
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6552596091
Dimensions7.07 × 8.05 × 4.73 mm
L/W Ratio1.14
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity, Needle, Indented Natural
Top View
7.07 mm8.05 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552596091
Side View
Table 60.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 58.8%

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$23,614 HKD|Low: HK$22,266 HKD|High: HK$55,003 HKD|Avg: HK$32,087 HKD|-10.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 5HK$22,368 HKD
Retailer 1HK$23,614 HKD
Retailer 7HK$27,306 HKD
Retailer 3HK$28,607 HKD
Retailer 2HK$30,613 HKD
Retailer 6HK$30,723 HKD
Retailer 4HK$49,329 HKD

45 data points across 7 retailers

13 retailersHK$22,368 HKD to HK$49,329 HKD

A
Cheapest Retailer
-
HK$22,368 HKD
A
Retailer 2
-
HK$23,614 HKD
View
A
Retailer 3
-
HK$27,306 HKD
View
Final sale: no returns
A
Retailer 4
-
HK$28,607 HKD
View
Retailer 5
-
HK$29,782 HKD
View
Price last confirmed 22 days ago
Retailer 6
-
HK$29,782 HKD
View
Price last confirmed 20 days ago
A
Retailer 7
-
HK$29,845 HKD
View
A
Retailer 8
-
HK$30,613 HKD
View
A
Retailer 9
-
HK$30,723 HKD
View
Retailer 10
-
HK$30,926 HKD
View
Price last confirmed 22 days ago
Retailer 11
-
HK$34,367 HKD
View
Price last confirmed 19 days ago
B+
Retailer 12
-
HK$49,329 HKD
View
Most Expensive
NZ Jewellers
c725a9b8-881d-4e8d-8d4d-ccdb7f702b80 · Oct 18
HK$51,891 HKD
$6,621 USD
View
Price last confirmed 19 days ago
12 more retailers have this diamond
Prices start from HK$22,368 HKDSave up to HK$26,961 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
1.51ct Heart
HK$22,368 HKD