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5.51ct L SI1 Round Natural Diamond

EX • L/SI1 • GIA 1565176145

Certificate GIA 1565176145

Diamond specifications and retailer prices

From HK$374,342 HKD
As of November 6, 2026
Save HK$57,584 HKD (13%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: HK$431,925 HKD at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 5.51ct natural round diamond

This 5.51ct natural round sits in the over five carat band, graded L colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1565176145. Listed at 3 retailers as of November 5, 2026, with prices from HK$374,342 to HK$431,925, a HK$57,584 spread on the same certified stone. Blue Nile lists it at HK$431,925. 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

5.51
Carat
L
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1565176145
Dimensions11.20 × 11.26 × 7.04 mm
L/W Ratio1.01
Top View
11.20 mm11.26 mm5.51 ctL / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1565176145
Side View
Table 58.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 62.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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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$431,925 HKD|Low: HK$374,342 HKD|High: HK$431,925 HKD|Avg: HK$407,334 HKD
Blue Nile
Retailer 2
Retailer 3
November 6, 2026
Retailer 2HK$374,342 HKD
Retailer 3HK$410,288 HKD
Blue NileHK$431,925 HKD

35 data points across 3 retailers

3 retailersHK$374,342 HKD to HK$431,925 HKD

B+
Cheapest Retailer
-
HK$374,342 HKD
B
Retailer 2
-
HK$410,288 HKD
View
Most Expensive
B
Blue Nile
30262738 · Nov 5
HK$431,925 HKD
$55,056 USD
View
2 more retailers have this diamond
Prices start from HK$374,342 HKDSave up to HK$57,584 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.

B+
5.51ct Round
HK$374,342 HKD