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Heart|Natural|GIA

1.51ct I SI1 Heart Natural Diamond

EX • I/SI1 • GIA 1242005145

Certificate GIA 1242005145

Diamond specifications and retailer prices

From HK$23,975 HKD
As of November 6, 2026
Save HK$29,970 HKD (56%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: HK$64,298 HKD at NZ Jewellers · As of September 25, 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1242005145. Listed at 16 retailers as of November 4, 2026, with a 125% 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1242005145
Dimensions7.02 × 7.91 × 4.55 mm
L/W Ratio1.13
Girdle conditionFaceted
Top View
7.02 mm7.91 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1242005145
Side View
Table 58.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 57.5%

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$27,752 HKD|Low: HK$23,575 HKD|High: HK$56,226 HKD|Avg: HK$35,053 HKD|-6.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 12HK$23,975 HKD
Retailer 8HK$27,313 HKD
Retailer 1HK$27,752 HKD
Retailer 11HK$29,288 HKD
Retailer 3HK$29,312 HKD
Retailer 13HK$29,853 HKD
Retailer 6HK$30,237 HKD
Retailer 7HK$30,566 HKD
Retailer 5HK$31,867 HKD
Retailer 2HK$35,582 HKD
Retailer 9HK$39,477 HKD
Retailer 4HK$50,661 HKD
Retailer 10HK$53,945 HKD

28 data points across 13 retailers

16 retailersHK$23,975 HKD to HK$53,945 HKD

A
Cheapest Retailer
-
HK$23,975 HKD
A
Retailer 2
-
HK$27,313 HKD
View
A
Retailer 3
-
HK$27,752 HKD
View
A
Retailer 4
-
HK$29,288 HKD
View
A
Retailer 5
-
HK$29,312 HKD
View
A
Retailer 6
-
HK$29,853 HKD
View
Final sale: no returns
A
Retailer 7
-
HK$30,237 HKD
View
A
Retailer 8
-
HK$30,566 HKD
View
A
Retailer 9
-
HK$31,867 HKD
View
B+
Retailer 10
-
HK$35,582 HKD
View
Retailer 11
-
HK$36,177 HKD
View
Price last confirmed 28 days ago
B+
Retailer 12
-
HK$37,173 HKD
View
B+
Retailer 13
-
HK$39,477 HKD
View
B+
Retailer 14
-
HK$50,661 HKD
View
B
Retailer 15
-
HK$53,945 HKD
View
Most Expensive
NZ Jewellers
028c2f82-29df-442d-9e7a-e4c4f55a4700 · Sep 25
HK$64,298 HKD
$8,204 USD
View
Price last confirmed 42 days ago
15 more retailers have this diamond
Prices start from HK$23,975 HKDSave up to HK$29,970 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$23,975 HKD