CaratHunter
Plans
Heart|Natural|GIA

1.51ct E SI1 Heart Natural Diamond

EX • E/SI1 • GIA 6511530906

Certificate GIA 6511530906

Diamond specifications and retailer prices

From HK$41,792 HKD
£4,194 GBP
As of October 31, 2026
Save HK$35,849 HKD (46%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: HK$77,641 HKD at NZ Jewellers · As of October 30, 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 E 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 6511530906. Listed at 9 retailers as of October 30, 2026, with prices from HK$41,792 to HK$77,641, a HK$35,849 spread on the same certified stone. NZ Jewellers lists it at HK$77,641. 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36.52°
Pavilion angle41.99°
OriginNatural
Grading LabGIA
CertificateGIA 6511530906
Dimensions6.98 × 8.02 × 4.83 mm
L/W Ratio1.15
Top View
6.98 mm8.02 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6511530906
Side View
Table 61.0%Crown 36.52°Girdle: Slightly Thick to ThickPavilion 41.99°Culet: NDepth 60.2%

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: Oct 31
Current: HK$77,641 HKD|Low: HK$41,662 HKD|High: HK$79,383 HKD|Avg: HK$53,257 HKD|-2.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 2HK$41,792 HKD
Retailer 3HK$43,566 HKD
Retailer 8HK$45,230 HKD
Retailer 4HK$46,423 HKD
Retailer 5HK$46,423 HKD
Retailer 9HK$46,922 HKD
Retailer 6HK$47,255 HKD
Retailer 7HK$68,762 HKD
NZ JewellersHK$77,641 HKD

45 data points across 9 retailers

9 retailersHK$41,792 HKD to HK$77,641 HKD

A
Cheapest Retailer
-
HK$41,792 HKD
£4,194 GBP
A
Retailer 2
-
HK$43,566 HKD
£4,372 GBP
View
B+
Retailer 3
-
HK$45,230 HKD
$5,765 USD
View
A
Retailer 4
-
HK$46,423 HKD
$5,917 USD
View
A
Retailer 5
-
HK$46,423 HKD
$5,917 USD
View
Retailer 6
-
HK$46,922 HKD
A$9,201 AUD
View
Price last confirmed 21 days ago
B+
Retailer 7
-
HK$47,255 HKD
$6,023 USD
View
B+
Retailer 8
-
HK$68,762 HKD
£6,901 GBP
View
Most Expensive
B
NZ Jewellers
8134b5e0-c12e-4565-9ea7-62757ff29826 · Oct 30
HK$77,641 HKD
$9,896 USD
View
8 more retailers have this diamond
Prices start from HK$41,792 HKDSave up to HK$35,849 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$41,792 HKD