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Heart|Natural|GIA

1.51ct K SI1 Heart Natural Diamond

EX • K/SI1 • GIA 1538771191

Certificate GIA 1538771191

Diamond specifications and retailer prices

From HK$18,629 HKD
As of November 6, 2026
Save HK$3,676 HKD (16%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: HK$22,305 HKD at Blue Nile · As of November 5, 2026
View at Blue Nile

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 1538771191. Listed at 6 retailers as of November 5, 2026, with prices from HK$18,629 to HK$22,305, a HK$3,676 spread on the same certified stone. Blue Nile lists it at HK$22,305. 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
OriginNatural
Grading LabGIA
CertificateGIA 1538771191
Dimensions6.89 × 8.10 × 4.80 mm
L/W Ratio1.18
Culet sizeNone
Key to symbols
Twinning Wisp, Crystal, Feather, Cloud, Indented Natural
Top View
6.89 mm8.10 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1538771191
Side View
Table 58.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 59.2%

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$22,305 HKD|Low: HK$18,629 HKD|High: HK$27,682 HKD|Avg: HK$21,706 HKD|-19.4%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 4HK$18,629 HKD
Retailer 6HK$19,108 HKD
Retailer 3HK$20,017 HKD
Retailer 2HK$20,040 HKD
Retailer 5HK$21,647 HKD
Blue NileHK$22,305 HKD

45 data points across 6 retailers

6 retailersHK$18,629 HKD to HK$22,305 HKD

A
Cheapest Retailer
-
HK$18,629 HKD
A
Retailer 2
-
HK$19,108 HKD
View
A
Retailer 3
-
HK$20,017 HKD
View
A
Retailer 4
-
HK$20,040 HKD
View
A
Retailer 5
-
HK$21,647 HKD
View
Most Expensive
A
Blue Nile
27029150 · Nov 5
HK$22,305 HKD
$2,846 USD
View
5 more retailers have this diamond
Prices start from HK$18,629 HKDSave up to HK$3,676 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$18,629 HKD