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Heart|Natural|GIA

1.51ct K SI1 Heart Natural Diamond

EX • K/SI1 • GIA 6431871498

Certificate GIA 6431871498

Diamond specifications and retailer prices

From HK$16,952 HKD
As of November 6, 2026
Save HK$8,364 HKD (33%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: HK$25,316 HKD at 77 Diamonds · As of November 6, 2026
View at 77 Diamonds

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6431871498. Listed at 8 retailers as of November 6, 2026, with prices from HK$16,952 to HK$25,316, a HK$8,364 spread on the same certified stone. 77 Diamonds lists it at HK$25,316. 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.09°
Pavilion angle39.18°
OriginNatural
Grading LabGIA
CertificateGIA 6431871498
Dimensions6.82 × 8.06 × 4.63 mm
L/W Ratio1.18
Top View
6.82 mm8.06 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6431871498
Side View
Table 61.0%Crown 39.09°Girdle: MED-VTKPavilion 39.18°Culet: NoneDepth 57.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: HK$25,316 HKD|Low: HK$16,733 HKD|High: HK$25,596 HKD|Avg: HK$20,174 HKD|+1.4%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 5HK$16,952 HKD
Retailer 7HK$17,227 HKD
Retailer 8HK$17,313 HKD
Retailer 6HK$18,065 HKD
Retailer 9HK$20,612 HKD
Retailer 3HK$20,777 HKD
Retailer 4HK$20,871 HKD
Retailer 2HK$24,719 HKD
77 DiamondsHK$25,316 HKD

42 data points across 9 retailers

8 retailersHK$16,952 HKD to HK$25,316 HKD

A
Cheapest Retailer
-
HK$16,952 HKD
A
Retailer 2
-
HK$17,227 HKD
View
A
Retailer 3
-
HK$17,313 HKD
View
A
Retailer 4
-
HK$18,065 HKD
View
A
Retailer 5
-
HK$20,777 HKD
View
A
Retailer 6
-
HK$20,871 HKD
View
A
Retailer 7
-
HK$24,719 HKD
View
Most Expensive
A
77 Diamonds
HSMBVVDQGGSS · Nov 6
HK$25,316 HKD
£2,543 GBP
View
7 more retailers have this diamond
Prices start from HK$16,952 HKDSave up to HK$8,364 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$16,952 HKD