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Round|Natural|GIA

1.51ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6491354443

Certificate GIA 6491354443

Diamond specifications and retailer prices

From HK$17,871 HKD
As of November 6, 2026
Save HK$22,218 HKD (55%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: HK$41,878 HKD at NZ Jewellers · As of September 19, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round 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 and certified by GIA 6491354443. Listed at 16 retailers as of November 4, 2026, with a 124% 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle34.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6491354443
Dimensions7.37 × 7.32 × 4.50 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
7.37 mm7.32 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6491354443
Side View
Table 60.0%Crown 34.5°Girdle: ThickPavilion 40.8°Culet: NoneDepth 61.2%

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: Nov 6
Current: HK$24,916 HKD|Low: HK$17,267 HKD|High: HK$40,677 HKD|Avg: HK$25,166 HKD
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 11HK$17,871 HKD
Retailer 2HK$21,527 HKD
Retailer 3HK$21,535 HKD
Retailer 10HK$21,692 HKD
Retailer 13HK$22,163 HKD
Retailer 12HK$23,630 HKD
Retailer 4HK$24,038 HKD
Retailer 6HK$24,689 HKD
Retailer 1HK$24,916 HKD
Retailer 5HK$25,160 HKD
Retailer 7HK$27,921 HKD
Retailer 8HK$29,341 HKD
Retailer 9HK$40,089 HKD

43 data points across 13 retailers

16 retailersHK$17,871 HKD to HK$40,089 HKD

A
Cheapest Retailer
-
HK$17,871 HKD
A
Retailer 2
-
HK$21,527 HKD
View
A
Retailer 3
-
HK$21,535 HKD
View
A
Retailer 4
-
HK$21,692 HKD
View
A
Retailer 5
-
HK$22,163 HKD
View
A
Retailer 6
-
HK$23,630 HKD
View
Retailer 7
-
HK$24,038 HKD
View
Price last confirmed 49 days ago
Retailer 8
-
HK$24,038 HKD
View
Price last confirmed 25 days ago
A
Retailer 9
-
HK$24,689 HKD
View
A
Retailer 10
-
HK$24,916 HKD
View
A
Retailer 11
-
HK$25,160 HKD
View
Retailer 12
-
HK$27,733 HKD
View
Price last confirmed 48 days ago
A
Retailer 13
-
HK$27,921 HKD
View
B+
Retailer 14
-
HK$29,341 HKD
View
B
Retailer 15
-
HK$40,089 HKD
View
Most Expensive
NZ Jewellers
665bc02b-f100-4dc7-8719-186e063fbfef · Sep 19
HK$41,878 HKD
$5,338 USD
View
Price last confirmed 48 days ago
15 more retailers have this diamond
Prices start from HK$17,871 HKDSave up to HK$22,218 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 Round
HK$17,871 HKD