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Round|Natural|GIA

1.51ct I SI2 Round Natural Diamond

ID • I/SI2 • GIA 225

Certificate GIA 225

Diamond specifications and retailer prices

From HK$19,535 HKD
As of October 31, 2026
Save HK$33,240 HKD (63%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: HK$52,775 HKD at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA. Listed at 9 retailers as of October 31, 2026, with prices from HK$19,535 to HK$52,775, a HK$33,240 spread on the same certified stone. Blue Nile lists it at HK$52,775. 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
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 225
Dimensions7.27 × 7.32 × 4.58 mm
L/W Ratio1.01
Top View
7.27 mm7.32 mm1.51 ctI / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 225
Side View
Table 56.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 62.7%

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$52,775 HKD|Low: HK$19,535 HKD|High: HK$52,775 HKD|Avg: HK$38,145 HKD
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 6HK$19,535 HKD
Retailer 3HK$25,152 HKD
Retailer 4HK$26,117 HKD
Retailer 5HK$29,019 HKD
Retailer 7HK$41,195 HKD
Retailer 2HK$43,815 HKD
Blue NileHK$52,775 HKD

12 data points across 7 retailers

9 retailersHK$19,535 HKD to HK$52,775 HKD

A
Cheapest Retailer
-
HK$19,535 HKD
A
Retailer 2
-
HK$25,152 HKD
View
A
Retailer 3
-
HK$26,117 HKD
View
A
Retailer 4
-
HK$29,019 HKD
View
B+
Retailer 5
-
HK$41,195 HKD
View
Retailer 6
-
HK$43,635 HKD
View
Price last confirmed 60 days ago
B+
Retailer 7
-
HK$43,815 HKD
View
B+
Retailer 8
-
HK$44,890 HKD
View
Most Expensive
B+
Blue Nile
29189376 · Nov 5
HK$52,775 HKD
$6,727 USD
View
8 more retailers have this diamond
Prices start from HK$19,535 HKDSave up to HK$33,240 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$19,535 HKD